Testo, Inc. is a world leader in the design, development, and manufacture of portable test measurement instrumentation. Backed by over 50 years of measuring engineering experience, Testo's mission is to provide the best quality, service, and value in the industry. In addition, Testo is recognized as the leading worldwide manufacturer of portable combustion efficiency analyzers. read more

Since being founded in 1957, the Testo product line has expanded to include a large variety of temperature measuring instruments, such as data loggers, air velocity meters, humidity and dew point meters, refrigeration service analyzers, multi-function instruments, stack gas analyzers and air emission monitors, water analyzers, tachometers, sound, pressure and light meters, and thermal imagers. Testo has become a major supplier of HVAC, critical HVAC, refrigeration, airflow, and environmental monitoring instruments for markets as diverse as chemical, food service and production, pharmaceutical and biotech, and residential HVAC suppliers.

Testo offers NIST calibrations (where applicable) on all their instruments as well as ISO 9001 quality standards.

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CATEGORY
Air Velocity Meters / Anemometers ()
Ambient Conditions Monitors ()
Carbon Dioxide (CO2) Detectors ()
Combustion Analyzers ()
Cooking Oil Testers ()
Data Loggers ()
Dewpoint Meters ()
Flow Meters ()
Gas Detectors ()
Humidity Meters / Hygrometers ()
Indoor Air Quality (IAQ) Meters ()
Infrared Thermometers ()
Leak Detectors ()
Light Meters ()
Moisture Meters ()
pH / ORP Meters ()
Pressure Indicators ()
Pressure Sensors / Transmitters / Transducers ()
Refrigeration Test Equipment ()
Sound Level Meters ()
Thermal Imagers / Infrared Cameras ()
Thermometers ()
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Testo 510 Digital Manometer
Handheld, differential pressure meter for installation and maintenance work in and around ventilation and air conditioning
$149.00
$134.10
Testo 405i Hot Wire Anemometer
Smart probe that measures air velocity, volume flow, and temperature and transmits data via Bluetooth to an App on your smart device
$108.00
Testo 6740 Trace Humidity Sensor
Ideal for monitoring compressed air dryers and preventing system damage from condensing water vapor
$1,270.00
$1,143.00
Testo 635 Thermo Hygrometer
Humidity and temperature meter with wireless and memory options
$383.00
$344.70
Testo 557 Digital Manifold
4-valve refrigeration system analyzer with a remote vacuum probe for faster and more reliable evacuations
$499.00
$449.10
Testo 174 Temperature & Relative Humidity Data Logger
Temperature and relative humidity data logger with 16,000 memory slots available
$61.00
$54.90
Testo 625 Thermo Hygrometer
Handheld humidity and temperature meter with remote probe or wireless options
$251.00
$225.90
Testo 925 Type K Thermometer
1 channel temperature measuring instrument with optional wireless probes, Measuring range: -58 to 1832°F (-50 to 1000°C)
$111.00
$99.90
Testo 435 Multifunction HVAC and IAQ Meter
Easily measure flow speed, volume flow, air humidity and air temperature in one sequence, perfect for HVAC and IAQ applications
$562.00
$505.80
Testo 420 Flow Hood Kit
App integration via Bluetooth, flow straightener for more precise measurement at turbulent outlets
$2,195.00
$1,975.50
Testo 6621 RH & Temperature Transmitter
2 channel sensor, accurate, dependable RH sensor technology (± 2.5% RH), functional, attractive housing blends into any environment
$244.00
$219.60
Testo 645 Humidity Meter
Long-term stable, highly accurate humidity sensor, data analysis using comSoft 3
$754.00
$678.60
Testo 6651/6681 Humidity Transmitter
High-performance transmitters designed for monitoring critical climate applications in process engineering
$470.00
$423.00
Testo 480 IAQ Pro Meter
Reliable, accurate, rugged, meets any indoor climate measurement
$1,278.00
$1,150.20
Testo 6440 Series Compressed Air Flow Meters
Measures compressed air flow to aid in the determination of leakage, consumption and the implementation of peak load management
$968.00
Testo 549 Digital Manifold
Precisely measures high / low side pressure and instantly displays the corresponding saturation / evaporation temperatures for 60 refrigerants
$199.00
$179.10
Testo 175 Series Data Logger
Compact data loggers for temperature and humidity
$150.00
$135.00
In Stock
Testo 535 Ambient CO2 Monitor
Highly accurate 2 channel infrared sensor carbon dioxide monitor with a 0 to 9,999 ppm measuring range
$543.00
$488.70
In Stock
Testo 425 Thermal Anemometer
Hot wire thermo-anemometer and compact air velocity and volume meter with thermal probe
$495.00
$445.50
Testo 320 Combustion Analyzer
RESNET certified combustion analyzer, combustion analysis in HD, high def & heavy duty, for residential and commercial applications
  • FREE Clamp meter & extended sensor warranty
$1,250.00
$1,125.00
Testo 104 IR Digital Thermometer
Dual purpose folding thermometer with pentration probe and non-contact infrared measurement
$137.00
$123.30
Testo 416 Mini-Vane Anemometer
Vane anemometer with cabled telescopic vane probe
$550.00
$495.00
Testo 405 Hot Wire Thermo-Anemometer
Economical, highly accurate hot wire thermo-anemometer with telescopic probe
$142.00
$127.80
Testo 270 Cooking Oil Tester
Easily, quickly and reliably determines the cooking oil quality
$520.00
$468.00
In Stock
Testo 608 Thermo Hygrometer
Affordable instrument continuously measures humidity, temperature and dewpoint from a wall or desktop
$87.00
$78.30
Testo 410i Vane Anemometer
Smart probe that measures air velocity, volume flow, and temperature and transmits data via Bluetooth to an App on your smart device
$90.00
Testo 922 Dual Type K Thermometer
Measuring range: -58 to 1832°F (-50 to 1000°C), ideally suited for application in the HVAC field, 2-channel temperature measuring
$154.00
$138.60
Testo 205 pH/Temperature Meter
Rugged food penetration pH meter with automatic temperature compensation
$271.00
$243.90
Testo 316-3 Refrigerant Leak Detector
Reliable leak detection for most refrigerants including all CFC, HFCs and HCFCs
$299.00
$269.10
In Stock
Testo 605i Thermo-Hygrometer
Smart probe that measures relative humidity and temperature and transmits data via Bluetooth to an App on your smart device
$90.00
Testo 815 Sound Level Meter
Versatile, general purpose instrument provides Class 3L accuracy for the evaluation of sound level in everyday work
$294.00
$264.60
Testo 550 Digital Manifold
Bluetooth enabled analyzer performs accurate temperature, pressure, superheat and sub-cooling measurements on refrigeration systems
$299.00
$269.10
Testo 330-2G LL Combustion Analyzer
Advanced combustion efficiency analyzers with dynamic graphic interface
  • FREE Clamp meter & extended sensor warranty
$2,460.00
$2,214.00
Testo 310 Residential Combustion Analyzer
Fully-featured, top-of-display icons, rugged, wide parameter range
  • FREE Voltage tester & extended sensor warranty
$625.00
$562.50
Testo 410 Air Velocity Meter
Vane anemometer and humidity meter with integrated NTC air thermometer
$113.00
$101.70
Testo 552 Bluetooth Vacuum Gauge
Digital vacuum/micron gauge with Bluetooth for up to 20,000 microns
$189.00
Testo 606 Moisture Meters
Pocket-sized professional moisture measurement technology
$104.00
$93.60
Testo 835-T2 Infrared Thermometer
50:1 long distance optic, high temperature range up to 2700 °F
$504.00
$453.60
Testo 316-1 Gas Leak Detector
Reliable natural gas leak detection with flexible probe
$253.00
$227.70
Testo 610 Air Humidity and Temperature Meter
Pocket-sized professional moisture measurement technology
$151.00
$135.90
In Stock
Testo 816-1 Sound Level Meter
Top-of-the-line sound level meter with an accuracy of ±1.4 dB and integrated storage for up to 31,000 readings
$619.00
$557.10
Testo 511 Digital Manometer
Pocket-sized abolute pressure measuring instrument
$188.00
$169.20
Testo VAC Smart Probe Set
Combination of four instruments to test and balance a multioutlet ventilation system & transmit data to your smart device
$381.00
Testo 622 / 623 Ambient Conditions Monitors
Precision benchtop measurement of temperature, humidity and pressure
$191.00
$171.90
Testo 176 Data Loggers
Up to 5-channel data loggers with high accuracy and metal housing
$378.00
$340.20
Testo 545 Light Meter w/ Data Logger
Log up to 3,000 readings and calculate the mean value with the touch of a button
$392.00
$352.80
Testo Refrigeration Smart Probe Set
Measure high-side & low-side refrigerant pressure & temperatures of AC/refrigeration systems & transmits data to your smart device
$266.00
Testo 6321 Differential Pressure Transmitter
Differential pressure transmitter with full functionality for automated air conditioning and ventilation applications
$402.00
$361.80
Testo 816 Sound Level Meter
Versatile sound level meter for general purpose sound measurements. Includes bar graph and outputs to connect to other instruments
$493.00
$443.70
Testo 570 Refrigeration System Analyzer Kit
Simultaneous superheating and subcooling calculations in real-time, w/ data storage
$749.00
$674.10
Testo 6383 Differential Pressure Transmitter
Differential pressure transmitter with cleanroom-conforming flat panel design and 10 Pa to 10 hPa measuring range
$1,294.00
$1,164.60
Testo 417 Large Vane Anemometer
Vane probe anemometer with built-in 4 inch vane
$399.00
$359.10
Testo 184 H1 Temperature and Humidity Data Logger
Temperature and humidity data logger with LCD display and USB port for configuration and data download
$170.00
$153.00
Testo 330-1G LL Combustion Analyzer
Advanced combustion efficiency analyzers with dynamic graphic interface
  • FREE Clamp meter & extended sensor warranty
$1,978.00
$1,780.20
Testo 184 T Series Temperature Data Loggers
Convenient, easy-to-use loggers monitor every step of the cold chain in the transport of sensitive goods by rail, in the air, or on the road
$49.00
$44.10
Testo Pocket Pro 540 Light Meter
Sensor sensitivity resembles that of the human eye
$146.00
$131.40
Testo 330i Flue Gas Analyzer
Combines proven measuring technology with remote measurement capability and wireless control
  • FREE Clamp meter & extended sensor warranty
$1,695.00
Testo 890 Series Thermal Imager
The Testo 890 offers 307,000 pixels (640 x 480), -4 to 212°F, sensitivity < 40 mK, and the highest resolution
$16,895.00
$15,205.50
Testo 317-2 Gas Leak Stick
Determines ambient propane and methane and audibly warns the user
$164.00
$147.60
Testo 875i-2 Thermal Imager Kit
The Testo 875i-2 offers 19,200 pixels (160 x 120), up to 662°F temp range, and 50mk sensitivity
$4,122.00
$3,709.80
Testo 6351 Differential Pressure Transmitter
Testo 6351 Differential Pressure Transmitter - Measures differential pressure, flow velocity and flow volume
$701.00
$630.90
Testo 510i Manometer
Smart probe that measures differential pressure and transmits data via Bluetooth to an App on your smart device
$102.00
Testo 512 Series Digital Manometers
Pressure and flow velocity measuring instrument with ranges from 0-2 hPa to 0-2000 hPa
$476.00
$428.40
Testo 845 Adjustable Focus Infrared Thermometer
Easily shift between close focus and long distance temperature measurement
$757.00
$681.30
Testo 104 Digital Thermometer
Digital, folding, waterproof thermometer
$98.00
$88.20
In Stock
Testo 830-T2 Infrared Thermometer
-8 to 752°F, 12:1 (D:S), ±1.5°F accuracy, 2 point laser sight, adjustable emissivity (0.1 to 1)
$99.00
$89.10
Testo 875i-1 Thermal Imager Kit
The Testo 875i-1 offers 19,200 pixels (160 x 120), up to 662°F temp range, and 50mk sensitivity
$2,895.00
$2,605.50
Testo 115i Pipe Clamp Thermometer
Smart probe that measures the temperature of pipes and transmits data via Bluetooth to an App on your smart device
$60.00
Testo 6381 Differential Pressure Transmitter
Measures differential pressure, flow velocity and flow volume with optional humidity and temperature measurement.
$857.00
$771.30
Testo 830-T1 Infrared Thermometer
-8 to 752°F, 10:1 (D:S), ±1.5°F accuracy, 1 point laser sight, adjustable emissivity (0.1 to 1)
$74.00
$66.60
Testo 549i Refrigeration Pressure Probe
Smart probe that measures refrigeration pressure and transmits data via Bluetooth to an App on your smart device
$72.00
Testo 605-HX Mini Thermohygrometer
Bendable humidity measurement stick
$109.00
$98.10
Testo 805 Mini IR Thermometer
Waterproof infrared thermometer with a measurement range from -25 to +250°C
$49.00
$44.10
Testo 103 Digital Thermometer
Compact, digital, folding, waterproof thermometer
$56.00
$50.40
Testo 805i IR Thermometer
Smart probe that measures non-contact temperature and transmits data via Bluetooth to an App on your smart device
$90.00
Testo 317-3 Ambient CO Stick
Carbon monoxide monitor that detects CO in ambient air and warns with visual and audible alarms
$193.00
$173.70
Testo 184 G1 Temperature, Humidity and Shock Data Logger
Easy-to-use data logger for the monitoring of shock, relative humidity and temperature during transportation
$316.00
$284.40
Testo 882 Thermal Imager Kit
The Testo 882 offers 76,800 pixels (320 x 240), -4 to 662°F, and 50mK thermal sensitivity
$5,722.00
$5,149.80
Testo 810 Infrared Thermometer
Allows measurement of both air temperature and non-contact surface temperature in one instrument
$88.00
$79.20
Testo 835-T1 Infrared Thermometer
50:1 long distance optic, 4-point laser shows the exact measuring area for precise readings
$251.00
$225.90
Testo 830-T4 Infrared Thermometer
-8 to 752°F, 30:1 (D:S), ±1°F accuracy, 2 point laser sight, adjustable emissivity (0.1 to 1)
$150.00
$135.00
Testo 885-2 Thermal Imager Kit
The Testo 885-2 offers 76,800 pixels (320 x 240), up to 662°F, and 30mk sensitivity
$8,316.00
$7,484.40
Testo 905i Thermometer
Smart probe that measures air temperature and transmits data via Bluetooth to an App on your smart device
$78.00
Testo Hydronic Heating System Smart Probe Set
Determine gas flow and static pressure, measure temperature of radiators and pipes, and transmit data to your smart device
$254.00
Testo 875i-2 Deluxe Thermal Imager Kit
The Testo 875i-2 kit offers 19,200 pixels (160 x 120), up to 662°F temp range, and 50mk sensitivity
$5,495.00
$4,945.50
Testo 885-1 Thermal Imager
The Testo 885-1 offers 76,800 pixels (320 x 240), up to 662°F, and 30mk sensitivity
$7,260.00
$6,534.00
Testo 885-2 Deluxe Thermal Imager Kit
The Testo 885-2 offers 76,800 pixels (320 x 240), up to 662°F, and 30mk sensitivity
$10,428.00
$9,385.20
Testo 835-H1 Infrared Thermometer
50:1 long distance optic, humidity measurement range: 0 to 100% rH
$378.00
$340.20
Testo 184 T4 Temperature Data Logger
Cryogenic temperature logger designed for monitoring goods shipped with dry ice
$213.00
$191.70
Testo 6610 Series Digital Probes
Digital probes for use with the Testo 6681 humidity transmitter
$433.00
$389.70
Testo Clamp Temperature Probe
Testo clamp temperature probe for Testo refrigeration system analyzers
$54.00
$48.60
Testo 6600 Series Digital Probes
Digital probes for use with the Testo 6651 humidity transmitter
$303.00
$272.70
Testo Temperature Probes
Temperature probes for Testo 400, Testo 650 and Testo 950 reference meters
$102.00
Testo ComSoft Professional 4 Software
Data management software for Testo light meters
$379.00
$341.10
Testo Standard Probes
Wide range of probes for use with the Testo 635 thermo-hygrometer
$68.00
$61.20
Testo 0602 2292 Waterproof Stainless Steel Probe
Waterproof stainless steel food probe, TC type K, tip Ø 4 mm x 125 mm length, -76 to 752°F / -60 to +400°C
$87.00
$78.30
Testo 0393 0005 Replacement O2 Sensor
$110.00
$99.00
Testo 0572 6172 Humidity / Temperature Probe
Measuring range: -4 to 158°F, 4 ft cable, 0-100 %RH, mini DIN plug
$268.00
$241.20
Testo Pitot Tube
Pitot tubes for 510/511/512 digital manometers
$138.00
$124.20
Testo Humidity and Pressure Probes
Humidity and pressure probes for Testo 400 & Testo 650 reference meters
$295.00
$265.50
Testo 0393 0101 Replacement CO Sensor
$525.00
$472.50
Testo Thermal Printer Paper
Thermal paper for Testo Infrared printer
$30.00
$27.00
In Stock
Testo Easy Heat Software
Easy heat software
$136.00
$122.40
Testo 0554 4209 Tripod
420 Tripod, extendable to 13' (4m)
$360.00
$324.00
Testo 0602 5793 Type K Cryogenic Probe Type K
Cryogenic probe Type K, 20" / 500mm bendable, tip Ø 1.5 mm (-200 to 40°C)
$40.00
$36.00
Testo RH Calibration Set
Perform quick checks or full calibrations for humidity probes
$336.00
$302.40
Testo 0393 0053 Replacement CO Sensor
Replacement CO Sensor, 0 to 4000 ppm
$210.00
$189.00
Testo 0602 0293 Air / Immersion / Penetration Probe
Probe for wireless handle Type K, tip Ø 3.4 mm x 30 mm, probe Ø 5 mm x 100 mm, -58 to 662°F (-50 to +350°C)
$53.00
$47.70
Testo 435 Air Quality Probes
Air quality probes for the Testo 435 multifunction HVAC and IAQ meter
$507.00
$456.30
Testo Spare Flow Hoods
Spare flow hoods for the 420 Balometer
$200.00
$180.00
Testo 0390 0061 Replacement O2 Sensor
Spare O2-sensor for the testo 330-1 LL / -2 LL
$325.00
$292.50
Testo Temperature Probes
Temperature probes for Testo Meters
$48.00
$43.20
Testo Silicone Hose
16' silicone hose for pressure measurement
$49.00
$44.10
Testo Waterproof Pt100 Immersion/penetration Probe
Pt100 sensor for accurate measurements of -58 to 752°F temp range, ideal for laboratory applications
$88.00
$79.20
Testo PTFE (Teflon) sintered filter
Ø 12 mm, not affected by condensation, water-repellent, resistant to corrosive substances
$93.00
$83.70
Testo Wireless Module
Wireless module for upgrading Testo meters to a wireless option
$49.00
$44.10
Testo Wireless Probes
Wireless probes for use with Testo meters
$74.00
$66.60
Testo 0602 0993 Fast Action Surface Probe
90° fast action surface probe Type K
$164.00
$147.60
Testo Fast Battery Charger
Charging station for two rechargeable batteries
$273.00
$245.70
Testo 435 Air Speed Probes
Air speed probes for the Testo 435 multifunction HVAC and IAQ meter
$342.00
$307.80
Testo Globe Probe
Type K, class 1 probe measures the radiation temperature
$506.00
$455.40
Testo 0390 0074 Replacement NO Sensor
Replacement NO Sensor, 0 to 3,000 ppm
$525.00
$472.50
Testo 0602 0593 Type K Immersion Probe
Immersion probe, water tight, TC type K, tip 1.5mm x 300mm length, Temp range: -76 to 1832°F (-60 to 1000°C)
$110.00
$99.00
Testo easyKool Software
easyKool software (for 556/560/570)
$299.00
$269.10
Testo Reference Oil
Analyzed reference oil, 100mL bottle of
$15.00
$13.50
Testo 2-valve manifold field service kit
2-valve manifold field service kit
$29.00
Testo Smart Probe Case
Impact-resistant, flexible, zippered shell with protective foam insert and precise fit compartments
$31.00
Testo 400520 1901 NIST Temperature Certificate
NIST Temperature certificate with 3 standard points
$85.00
Testo Smoke Pump Test Kit
Standard Smoke Pump Test Kit (includes scale, filter paper and lubricant)
$123.00
$110.70
Testo 0393 0002 Replacement O2 Sensor
$310.00
$279.00
Testo 0393 0151 Replacement NO Sensor
Replacement NO Sensor, 0 to 3,000 ppm
$525.00
$472.50
Testo TopSafe Protective Case
Indestructible protection case protects from impact
$32.00
$28.80
Testo Probe Connection Cables
5 or 16 foot probe connection cables for Testo 400 & Testo 645 meters
$61.00
$54.90
Testo Waterproof NTC Immersion / Penetration Probe
Measuring range: -58 to +302°F, accuracy 0.5% of reading
$79.00
$71.10
Testo 0393 0051 Replacement CO Sensor
$375.00
$337.50
Testo Carbon Monoxide Probe
Carbon monoxide ambient probe for the Testo 400, Testo 650 and Testo 330 meters
$514.00
$462.60
Testo 0390 0094 Replacement Low Range NO Sensor
Replacement Low Range NO Sensor, 0 to 300 ppm, 0.1 ppm resolution
$525.00
$472.50
Testo Humidity / temperature probe
± 2%RH, probe Ø 21 mm, 0 to +100 %RH, -4 to 158°F / -20 to +70°C
$529.00
$476.10
Testo Velocity Probes
Velocity probes Testo 400 reference meter
$589.00
$530.10
Testo Thermal Flow Probe
Flow and humidity measurements for ventilation channels and at ceiling/wall outlets. With telescoping handle
$686.00
$617.40
Testo Indoor Air  Quality Probe
IAQ probe including desk-top stand measures temperature, humidity, CO2 and pressure
$1,013.00
$911.70
Testo Precision HPD Probe
-40° to 122°F dew point
$2,143.00
$1,928.70
Testo 0554 8808 Switching Adapter
Switching adapter 5VDC 5A
$51.00
$45.90
Testo RS232 Cable
Connects Testo 545/645 light meter to PC for data transfer
$70.00
$63.00
Testo Pipe Wrap Temperature Probe
Pipe wrap probe with Velcro for pipes up to 3" in diameter
$94.00
$84.60
Testo Pt100 Penetration Probe
Stainless steel food probe for -58 to 752°F temperature range
$159.00
$143.10
Testo Power Supply
Wall-mountable 110-240 VAC box power supply
$167.00
$150.30
Testo Replacement Probe
Replacement probe for Testo 205 pH/Temperature meter
$175.00
$157.50
Testo Funnel Kit
Flow funnel kit for low flow (>50 CFM) measurements
$218.00
$196.20
Testo Measurement Chamber
Measuring Chamber for Testo Dew Point Transmitters
$245.00
$220.50
Testo Infrared Printer
Testo printer with wireless IRDA and infrared interface
$275.00
$247.50
Testo Flow Funnel
testovent 415 Flow Funnel for low flow (< 50 CFM)
$320.00
$288.00
Testo 0390 0118 Replacement CO Sensor
$375.00
$337.50
NIST Certificate of Calibration
NIST traceable certificate of calibration for sound level meters
$600.00
$540.00
Testo 0554 3922 NO Upgrade Module
NO Upgrade Module, 0 to 3000 ppm, high range, 1 ppm resolution
$1,138.00
$1,024.20
Testo Dew Point HPD Probe
Standard compressed air pressure dew point HPD probe, 300 mm length
$1,768.00
$1,591.20
Testo USB cable
USB cable (mini USB to Standard USB)
$22.00
$19.80
Testo Particle Filter 10 Pack
Particle filters - pack of 10
$31.00
$27.90
Testo Power Supply
100-240 V AC / 6.3 V DC power supply - Power supply/recharger (North American cord)
$55.00
$49.50
Testo 316-3 Replacement Sensor
Replacement sensor for Testo 316-3 refrigerant leak detector
$55.00
$49.50
Testo 0516 1200 Case
Compact carrying case
$67.00
$60.30
Testo 0602 1993 Waterproof Surface Probe
Waterproof surface probe with flat tip Type K
$68.00
$61.20
In Stock
Testo Surface Temperature Probe
Testo surface temperature probe for Testo 550/570 refrigeration system analyzer
$92.00
$82.80
Testo 0628 0030 Needle Probe
Type T thermocouple for monitoring cooking in an oven at temperatures of -56 to 482°F
$115.00
$103.50
Testo Pitot Tube
"L"-type pitot tube 13" SS 1112°F no T/C
$138.00
$124.20
Testo Pressure-tight Screw Connection
Testo Pressure-tight Screw Connection
$213.00
$191.70
Testo Probe Handle
Probe handle for Testo plug-in measuring tips
$254.00
$228.60
Testo Tripod
Tripod for the 480 IAQ Meter
$279.00
$251.10
Testo 0572 6174 Humidity / Temperature Probe
Measuring range: 0 to 104°F, 7 ft cable, tip 4 mm x 125 mm, 0-100 %RH, mini DIN plug
$313.00
$281.70
Testo 435 Light Probe
Light probe for the Testo 435 multifunction HVAC and IAQ meter
$452.00
$406.80
Testo Storage Cap
Storage cap for use with Testo 205 pH/Temperature meters
$13.00
$11.70
Testo Manual Smoke Pump Filter Paper
Manual smoke pump filter paper - 40 strips
$15.00
$13.50
Testo 0516 1201 Hard Case
Protect your Testo instrument and probes
$48.00
$43.20
Testo 0409 1092 Handle for plug in thermocouples
Handle for plug in thermocouples
$83.00
$74.70
Testo Transport Case
Transport case for Testo 645
$108.00
$97.20
Testo Wireless Handle
Wireless handle for plug-in probe heads
$121.00
$108.90
Testo Teflon Protection Cap
Testo Teflon Protection Cap
$121.00
$108.90
Testo Pt100 Laboratory Probe
Measuring range: -58 to 752°F
$125.00
$112.50
Testo 0628 0026 Waterproof Needle Probe
Waterproof super-fast needle probe, highly accurate measurements without visible penetration hole, TC type K
$126.00
$113.40
Testo 0602 0693 Hi-Temp Surface Probe
Hi-temp surface probe with small flat head
$126.00
$113.40
Testo 0516 1435 Case
Deluxe service case for Compact Pro (435 & 635)
$177.00
$159.30
Testo Flue Gas Probe
Modular flue gas probe, 0.3" diameter, 12" long, 25" hose
$262.00
$235.80
Testo System Case
System case for Comfort Level Measurements
$273.00
$245.70
Testo System Case for HVAC Measurements
System case for HVAC measurements
$273.00
$245.70
Testo 0602 2394 Flat Head Surface Probe
Flat head surface probe Type K
$370.00
$333.00
Testo 0554 7806 SuperResolution
SuperResolution technology improves the image quality by one detector class
$410.00
$369.00
Testo Temperature Probes
Pt100 immersion / penetration probe or flexible immersion probe
$463.00
$416.70
Testo Precision Measurement Chamber
Precision measurement chamber with adjustable flow
$632.00
$568.80
Testo Vane Probe
Vane probe, 0.6" diameter with telescope
$679.00
$611.10
Testo Comfort Level Probe
Determines the air velocity and draft risk in accordance with DIN EN 13779.
$823.00
$740.70
Testo Protective Cap
Testo plastic protective cap
$7.00
$6.30
Testo 0516 0220 TopSafe
TopSafe for 925 & 926
$32.00
$28.80
Testo 0699 3393 Connection Cable
Connection cable for alarm output, 5 meters
$40.00
Testo 0628 0020 Velcro Pipe Wrap Probe
Type K thermocouple attaches to pipes up tp 120mm in diameter, measuring temperatures of -60 to 250°F
$49.00
$44.10
Testo TopSafe Case
TopSafe Case for 316-1 Analyzer
$61.00
$54.90
Testo Teflon Sintered Filter
Teflon sintered filter (21mm) diam.
$66.00
$59.40
Testo 0554 0592 16' Type K extension cable
16' Type K extension cable
$67.00
$60.30
Testo Cooking Oil Tester Calibration
Factory calibration of Testo 270 cooking oil tester
$100.00
$90.00
Testo 0628 1292 Penetration probe with metal protection tube
Penetration probe with metal protection tube
$107.00
$96.30
Testo Probe Extension
Probe extension cable 16'
$112.00
$100.80
Testo 10N magnetic probe
Thermocouple type K (2.2 lbs. holding force), measuring range: -58 to 752°F (-50 to +400°C), 5.1ft of cable
$197.00
$177.30
Testo Pipe Clamp Probe
Clamp probe NTC for pipes from 1/4" to 2 1/2"
$199.00
$179.10
Testo Multi-Hole Probe
Modular multi-hole probe (for avg CO), tube only, no handle, 5/16" dia.
$204.00
$183.60
Testo DIN Rail Power Supply
DIN rail mountable 90-240 VAC power supply
$210.00
$189.00
Testo Connection Plug
Connection plug with 2 alarm points for Testo 6740 Series Trace Humidity Sensor
$235.00
$211.50
Testo 330 Gas Leak Detection Probe
Gas leak detection probe for Testo 330 combustion analyzer
$312.00
$280.80
Testo Flow Funnel
testovent 410 Flow Funnel for low flow (< 50 CFM)
$357.00
$321.30
Testo High Humidity Level Probe
High humidity level probe w/ heated sensor element, no humidity on sensor
$1,112.00
$1,000.80
Testo Lithium button battery
Lithium button battery, CR2032
$6.00
$5.40
Testo Silicone Heat Conducting Paste
Silicone heat conducting paste 0.49 oz / 14 g
$15.00
$13.50
Testo Plug-In Power Supply
Plug-in mains adapter, 5 VDC 500 mA with European adapter, 100-250 VAC, 50-60 Hz
$26.00
$23.40
Testo Particle Filter
Particle filters - pack of 10
$26.00
$23.40
Testo Smoke Pump Scale
Smoke pump scale
$27.00
$24.30
Testo Bead Tip Thermocouple
Fiber glass sheating, measuring range: -58 to 752°F, 59" flexible bead tip
$31.00
$27.90
Testo 0516 0222 TopSafe for 922
$32.00
$28.80
Testo Sensor metal protective cap
Sensor metal protective cap (slotted), Ø 12 mm, flow velocities of < 7 m/s
$38.00
$34.20
Testo Service Case
Protective case for the safe storage of Testo instruments
$44.00
$39.60
Testo Wall / Duct  Transmitter Holder
Testo Wall / Duct Transmitter Holder
$45.00
$40.50
Testo Industrial TC type K probe
Stainless steel sleeve, 6ft of cable, Measuring range: 58 to 400°F
$51.00
$45.90
Testo Sintered Cap
Sintered cap 21mm diameter
$52.00
$46.80
Testo Connection Hose
Connection hose, silicone-free, 5m
$52.00
$46.80
Testo Pressure Reading Adapter
Adapter for pressure readings for Testo 320 / 330 combustion analyzers
$52.00
$46.80
Testo TopSafe
TopSafe for 445, 645
$53.00
$47.70
Testo Replacement TC head
Replacement TC head for Pipe Clamp Probe
$56.00
$50.40
Testo Teflon Sintered Filter
Testo Teflon Sintered Filter
$57.00
$51.30
Testo Immersion / penetration temp NTC probe
5ft (1.5m) cable,measuring Range: -31 to 176°F (-35 to +80°C)
$63.00
$56.70
Testo Recharger
Recharger with 4 NiMH rechargable batteries
$66.00
$59.40
Testo Battery Charger
Desktop charging station for rechargeable battery
$70.00
$63.00
Testo testoFix Probe Holder
Rеlіаblе аttасhmеnt оf thе рrоbе tо thе ореnіng оf thе tubе wіthоut lоѕіng thе fluе gаѕ
$64.00
Testo Air Temperaure Probe
Testo air temperature probe for Testo 550/570 refrigeration system analyzer
$82.00
$73.80
Testo TC Adapter
connect NiCr-Ni thermocouples and probes with open wire ends
$100.00
$90.00
Testo System Case for 330
Standard system case for 330 analyzer
$105.00
$94.50
Testo 0554 8852 Spare Battery
Spare battery for the 885 and 890
$117.00
$105.30
Testo Combustion Air Temperature Probe
Combustion air temperature probe, 2.4" immersion w/ 13' cable for Testo 330 combustion analyzers
$130.00
$117.00
Testo Combustion Air Temperature Probe
Combustion air temperature probe, 7.5"" immersion, 190mm shaft, 2.2 meter cable for Testo 330 combustion analyzers
$130.00
$117.00
Testo Differential Temperature Probe Set
Differential temperature set consisting of 2 Velcro probes and temperature adapter
$132.00
$118.80
Testo Immersion probe Type K
Immersion probe Type K
$144.00
$129.60
Testo Pipe clamp probe
Thermocouple type K for pipes 0.2" to 2.5", measuring range: -76 to 266°F (-60 to +130°C)
$148.00
$133.20
Testo Dual Wall Probe
Curved, dual wall probe for annular gap O2 supply
$176.00
$158.40
Testo IR Printer
IR Printer for the 310 Combustion Analyzer
$185.00
$166.50
Testo 0628 9992 Cooking Surface Probe
Surface probe for cooking surfaces, Type K
$185.00
$166.50
Testo Compact Probes
7" or 12" Compact Probes, 1/4" diameter w/ 5' hose 932°F
$196.00
$176.40
Testo Hose Extension
9' hose extension for Testo 320 / 330 combustion analyzers
$217.00
$195.30
Testo System Case
System case for Testo 400, 650 and 950 Meters
$240.00
$216.00
Testo Cooling Coil
Cooling coil for Measuring Chamber
$244.00
$219.60
Testo 0554 8851 Rapid Charger Two Bay
Rapid Charger Two Bay for the Testo 885 and the Testo 890
$262.00
$235.80
Testo Flow-Through Meter
$300.00
$270.00
Testo Modular Probes
7" or 12" Modular probe, 5/16" dia, w/ 7' hose, t max=932°F
$303.00
$272.70
Testo Telescopic Handle
Increases the reach of the Testo 400 & Testo 650 meters up to 1 meter
$356.00
$320.40
Testo TC with Tube
TC with tube and plug NiCr-Ni
$363.00
$326.70
Testo Aluminum Service Case
Protective aluminum service case for Testo 400 & Testo 650 meters
$369.00
$332.10
Testo Light Probe
Light probe for the 480 IAQ meter
$411.00
$369.90
Testo Humidity and Temperature Probe
Humidity and temperature probe Ø 12 mm
$442.00
$397.80
Testo Probe Shaft
Replacement 13" probe shaft, 5/16" diameter, t max=1832 °F with probe stop
$507.00
$456.30
Testo 0554 0289 Lens Protection Glass
Lens protection glass for the Testo 885 and 890 thermal imagers
$528.00
$475.20
Testo Vane Probe (4" diameter)
Vane probe 4" diameter (100 mm)
$699.00
$629.10
Testo Carbon Dioxide Probe
Carbon dioxide (CO2) ambient probe for Testo 400, Testo 650 and Testo 950 reference meters
$741.00
$666.90
Testo Humidity / Temperature Immersion / Penetration Probe
For equilibrium moisture or for measurements in exhaust ducts to +120°C,
$809.00
$728.10
Testo HUMIDITY-MOISTURE Probes
High temperature/humidity, Flexible humidity probe and Water activity (aW) probe
$1,291.00
$1,161.90