Testo 645 Humidity Meter
$809.00
$728.10

0560 6450

Testo

Usually ships in 3-5 business days [?]

Need Help? Call 1-800-884-4967 8:00am to 5:30pm ET

Features

  • 4-line display
  • Integrated RS232 interface
  • Non-contact transmission of measurement logs via infrared
  • Saves up to 3000 readings
  • Selects up to 99 locations
  • Quick printout of data on location
  • Holds max/min/mean values

The testo 645 humidity measuring instrument automatically displays the parameters relative humidity, absolute humidity, dew point, degree of humidity, enthalpy and temperature. Convenient data analysis on your PC with location name.

The 645 provides quick-action temperature measurements using NiCr-Ni probes, highly accurate temperature measurement using 1/10 DIN Pt100 probes and "Zero errror adjustment" offset is saved in probe. The TopSafe case protects your measuring instrument from impact, dust and water. Ideal for tough industrial applications.

The 645 measures:

  • Dew point
  • Absolute humidity
  • Degree of humidity
  • Enthalpy

Cables

Testo Probe Extension
Probe extension cable 16'
$120.00
$108.00
Testo RS232 Cable
Connects Testo 545/645 light meter to PC for data transfer
$75.00
$67.50

Printers

Testo Infrared Printer
Testo printer with wireless IRDA and infrared interface
$295.00
$265.50
Testo Thermal Printer Paper
Thermal paper for Testo Infrared printer
$32.00
$28.80
In Stock

Sensors/Probes

Testo HUMIDITY-MOISTURE Probes
High temperature/humidity, Flexible humidity probe and Water activity (aW) probe
$1,385.00
$1,246.50
Testo Humidity and Pressure Probes
Humidity and pressure probes for Testo 400 & Testo 650 reference meters
$316.00
$284.40
Testo Humidity / Temperature Immersion / Penetration Probe
For equilibrium moisture or for measurements in exhaust ducts to +120°C,
$868.00
$781.20
Testo High Humidity Level Probe
High humidity level probe w/ heated sensor element, no humidity on sensor
$1,193.00
$1,073.70
Testo Humidity / temperature probe
± 2%RH, probe Ø 21 mm, 0 to +100 %RH, -4 to 158°F / -20 to +70°C
$567.00
$510.30
Testo Dew Point HPD Probe
Standard compressed air pressure dew point HPD probe, 300 mm length
$1,916.00
$1,724.40
Testo Precision HPD Probe
-40° to 122°F dew point
$2,299.00
$2,069.10
Testo Temperature Probes
Surface probe and high temp probe options available
$215.00 to $229.00
Testo Immersion probe Type K
Immersion probe Type K
$165.00
$148.50
Testo Temperature Probes
Pt100 immersion / penetration probe or flexible immersion probe
$532.00
$478.80

Batteries/Chargers

Testo Lithium button battery
Lithium button battery, CR2032
$7.00
$6.30

Cases

Carrying cases, spare cases

Testo System Case
System case for Testo 400, 650 and 950 Meters
$257.00
$231.30
Testo Aluminum Service Case
Protective aluminum service case for Testo 400 & Testo 650 meters
$395.00
$355.50
Testo TopSafe
TopSafe for 445, 645
$56.00
$50.40
Testo Transport Case
Transport case for Testo 645
$115.00
$103.50

Accessories

Please consider these optional accessories.

Testo TC with Tube
TC with tube and plug NiCr-Ni
$219.00
$197.10
Testo Silicone Heat Conducting Paste
Silicone heat conducting paste 0.49 oz / 14 g
$17.00
$15.30
Testo Recharger
Recharger with 4 NiMH rechargable batteries
$70.00
$63.00
Testo RH Calibration Set
Perform quick checks or full calibrations for humidity probes
$360.00
$324.00
Testo Sintered Cap
Sintered cap 21mm diameter
$55.00
$49.50
Testo Teflon Sintered Filter
Teflon sintered filter (21mm) diam.
$70.00
$63.00
Testo Sensor metal protective cap
Sensor metal protective cap (slotted), Ø 12 mm, flow velocities of < 7 m/s
$40.00
$36.00
Testo Teflon Sintered Filter
Testo Teflon Sintered Filter
$61.00
$54.90
Testo PTFE (Teflon) sintered filter
Ø 12 mm, not affected by condensation, water-repellent, resistant to corrosive substances
$100.00
$90.00
Testo Replacement TC head
Replacement TC head for Pipe Clamp Probe
$60.00
$54.00
Testo Probe Connection Cables
5 or 16 foot probe connection cables for Testo 400 & Testo 645 meters
$65.00
$58.50