Indoor gardening encompasses a wide range of needs. Whether you are a simply growing your own starts for a summer vegetable garden, a hobbyist with a nice selection of well-cared-for house plants, or a commercial indoor grower with a sophisticated hydroponic system; we have a selection of instruments that can help you better control the growing conditions and provide you with better results.

We carry a number of products that make indoor growing easier and more efficient. From easy-to-use handheld instruments that allow quick checks on growing conditions, to fully integrated systems with advanced control functions, we have the solutions for nearly all indoor gardening applications. And, as always, we have 20 applications engineers ready to help you find the best products for your needs.

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Extech CO100 CO2 Monitor
Measures carbon dioxide, Air temperature and humidity with user programmable visual and audible alarm
$279.99
In Stock
Rosemount 8750W Magnetic Flow Meter
High performance magnetic flow meter with transmitter customized for water, wastewater & utility applications
$3,393.00
$2,103.66
GPI TM Series Water Meter
Industrial economy turbine flow meter for use with water applications, 1/2 inch to 4 inch meters, flow ranges to 600 GPM
$373.00
$298.40
In Stock
Rosemount 8700 Series Flanged Flowtube Sensors
8705 and 8707 flanged flowtube sensors for conductive liquids and slurries
$3,348.00
Alicat Scientific M Series Mass Flow Meters
An extremely fast, accurate mass flow meter with no warm-up time and unparalleled versatility
$910.00
Alicat Scientific MC Series Mass Flow Controllers
Mass flow controllers for precision gas flow control
$1,215.00
Horiba U-50 Series Multi-Parameter Water Quality Meter
Measure and display up to 11 water quality parameters simultaneously
$3,345.00
YSI Professional Plus Multiparameter Meter
The toughest, smartest and most versatile water quality meter available
$1,260.00
$1,197.00
In Stock
GPI G2 Turbine Flow Meter
Flow range from 1 to 10 up to 20 to 200 GPM (formerly known as the RG45-B)
$834.00
$667.20
Krohne OPTIFLUX 4000 Electromagnetic Flow Sensor
Multiple application electromagnetic flow sensor / magmeter
$2,344.00
Brooks Sho-Rate Model 1350 / 1355 Variable Area Flow Meter
Low flow glass tube flow meter, purge applications, ranges up to 34 gph and 140 scfh, interchangeable tubes and floats
$213.39
Honeywell IAQPoint2 Indoor Air Quality Monitor
Touchscreen, triple monitoring (CO2 or VOCs, temperature and humidity)
$221.00
In Stock
Fuji Electric Time Delta-C Ultrasonic Flow Meter
Transit time, clamp-on flow meter for noninvasive liquid flow measurement
$2,249.00
In Stock
GPI Flomec QSE Electromagnetic Flow Meter
Dependable, highly accurate electromagnetic flow meter designed for flow and usage monitoring in commercial applications
$650.00
Seametrics MJN / MJP Series Pulse Water Meter
Dry top multi-jet design, tolerates low quality water, sensors types: hall-effect device, reed switch, totalizer
$109.00
In Stock
Greyline Instruments PTFM 1.0 Ultrasonic Flow Meter
Portable transit time flow meter for accurate flow measurements of clean liquids with less than 2% solids or gas bubbles
$4,295.00
In Stock
GPI A1 Turbine Flow Meter
Flow range from 0.3 to 300 GPM (formerly known as the RG45-A)
$639.00
$511.20
Brooks SLA5800 Series Thermal Mass Flow Meters
Elastomer sealed, digital thermal mass flow meter for general purpose, flow ranges starting at 0.003 to 50 lpm up to 100 to 2500 lpm
Select options for pricing
Seametrics EX100 / 200 Series Magmeter
Electromagnetic flow sensor, insertion style for 3 to 48 inch pipe
$1,272.00
Greyline Instruments PDFM 5.1 Doppler Flow Meter
Doppler flow meter for flow troubleshooting, balancing and checking performance of permanent flow meters
$3,950.00
In Stock
Gems FT-330 Series Turbine Flow Meter
Highly accurate and repeatable turbine flow sensors designed for low flow OEM applications.
$109.00
In Stock
Edgetech RH CAL Portable Relative Humidity Calibrator
Portable, NIST traceable chilled mirror calibration chamber for relative humidity, temperature, and dew point
$13,750.00
Seametrics EX800 Series Magmeter
Electromagnetic flow sensor, fixed depth insertion for 1 to 12 inch pipes
$709.00
In Stock
Brooks Model 3750 Variable Area Flow Meters
All metal variable area flow meter, flow ranges up to 100 I/h or 26 GPH, 316 stainless steel or monel K-500 parts
$906.65
Seametrics IP800 Series Paddlewheel Flow Meter
Fixed-depth paddlewheel flow meter Replaces ES45-A
$341.00
In Stock
Telaire T8000-R Series CO2 Monitor
Low cost, high performing CO2 transmitter with relay for the building controls and indoor growers markets
$369.60
$295.68
In Stock
Horiba pH11 / pH22 / pH33 LAQUAtwin pH Meters
Flat pH sensor with temperature compensation offers a reliable and quick direct measurement of micro-samples from 100μL
$120.00
Gems FT-110 Series Turbine Flow Meter
Ideal for OEM applications involving low flow liquid monitoring
$119.00
In Stock
Alicat Scientific Whisper MW Series Mass Flow Meter
Low pressure drop flow meters for use in systems with very low differential pressure availability
$1,215.00
Telaire T7001 CO2 Monitor
Part of the 7000 series, handheld indoor air quality testing for carbon dioxide, temperature and ventilation rates
$615.65
$492.52
In Stock
Seametrics SP Series Turbine Flow Meter
Low flow, chemical resistant, in-line turbine flow meter, replaces ES45-BIMPELL
$328.00
Alicat Scientific MB Series Mass Flow Meter
Portable, rechargeable meter that measures mass flow, volumetric flow, temperature & pressure
$1,165.00
Kobold MIK Series Magneto-Inductive Flow Meter
Magneto-inductive flow meter is perfect for reliably measuring the flow of conductive liquids
$557.00
Extech MO750 Soil Moisture Meter
Monitor moisture in the soil with built-in 8" heavy duty probe
$289.99
In Stock
Kobold DVZ Series Vortex Flow Meter
The perfect solution for flow applications where reliability and low cost are desired
$222.00
Brooks Sho-Rate Model 1250 / 1255 Variable Area Flow Meter
Sho-Rate low flow galss tube flow meter, 65 or 150mm scale lengths, 180° rotating lens, EZ-change design
$134.00
Kobold PSR/PS Paddle Flow Switch
Paddle type flow switch with a maximum pressure of 1450 PSI for brass and 3600 PSI for SS, replaces the OK15
$87.00
Brooks GF100 / GF120 / GF125 Mass Flow Controllers
High purity and ultra-high purity digital thermal mass flow devices, flow range from 3 sccm to 55 slm, MultiFlo capabilities
$2,315.00
Gems FS-200 Series Flow Switch
Ideal for detection of improper flow rates in high volume lubrication, cooling or process systems
$214.00
Telaire Ventostat Series CO2 Monitor
Commercial grade Carbon dioxide detectors for ventilation control and air quality applications
$332.64
$266.11
In Stock
Seametrics PE202 Magmeter
Low flow electromagnetic flow meter, straight pipe not required, 8-pin circular bulkhead connector
$1,066.00
WIKA CTH6500 Precision Thermometer
1 or 2 channel precision hand-held thermometer with Pt100, type K thermocouple, & humidity probe options
$745.09
Seametrics IP110/210 Series Paddlewheel Flow Sensor
Adjustable depth paddlewheel flow sensor
$564.00
Alicat Scientific PC / PCR Series Pressure Controllers
Provides precise control of absolute or gauge pressure of process gases and liquids
$1,015.00
GPI 01N Series Water Meter
Nylon turbine meter for water applications
$256.00
$204.80
In Stock
Kobold DRZ Series Positive Displacement Flow Meter
Piston type positive displacement flow meter with flow ranges from 1.6 to 110 GPH
$394.00
Brooks Sho-Rate Model 1358 Variable Area Flow Meters
Interchangeable tubes & floats, 10:1 rangeability, flow ranges up to 5 gpm and 15 scfm, single tube or multi-tube
$423.72
Kobold Kal-K and Kal-A Flow Sensors
Compact, thermal flow sensors with microprocessor-based drift stabilization
$366.00
Brooks Quantim Coriolis Mass Flow Controllers & Meters
Low flow coriolis mass flow measurement and control, range from 0.001 up to more than 27 kg/hr, proprietary optical sensing technique
$6,461.91
Brooks Model 1307 Variable Area Flow Meter
Glass tube variable Area flow meter, o-ring seal construction, measures water up to 10 gpm & air up to 45 scfm
$651.40
HOBO MX2300 Series Data Loggers
Bluetooth low energy-enabled loggers designed for wireless communication with a mobile device, weatherproof housing
$110.00
In Stock
Greyline Instruments PT400 Ultrasonic Flow Meter
Portable transit time flow meter is ideal for spot checks or for extended operation as a 4-20mA flow transmitter
$3,795.00
Extech LT300 Light Meter
High resolution light meter measures light intensity up to 20,000 Foot-candles or Lux
$179.99
Gems RFO Series Paddlewheel Flow Meter
Paddlewheel flow meter with high visibility rotors and 4.5 to 24 VDC Pulse Output
$119.00
Delmhorst F-2000 Moisture Meter
Digital moisture meter specifically designed to measure hay moisture in the windrow or in bales
$290.00
In Stock
E+E EE060 Humidity / Temperature Probe
OEM Humidity and Temperature Probe with voltage output
$216.00
Alicat Scientific PCD Series Pressure Controller
Dual valve controller with independently controlled intake and exhaust valves for fast and stable pressure control inside a closed system
$1,470.00
Brooks GF40 Mass Flow Controller
Elastomer sealed thermal mass flow controllers and meter, multiflo technology, 3 sccm to 50 slpm flow range
$1,875.00
GPI FM300H/R Chemical Meter
Electronic digital disc meter with rugged PBT housing
$307.00
$245.60
Krohne OPTIFLEX 1100 C Level Meter
Cost-effective, 2-wire loop-powered level meter designed for OEMs
$735.00
In Stock
E+E EE071 Humidity / Temperature Probe
Designed for use in demanding OEM applications, Modbus interface, excellent protection against pollution
$217.00
HOBO MX1102 Carbon Dioxide Data Logger
Bluetooth Smart enabled data logger stores and wirelessly transmits CO2, temperature and humidity readings
$595.00
In Stock
Telaire T5100 CO2 Transmitter
Low-cost, wall mount CO2 transmitter for demand-controlled ventilation applications
$168.96
$135.17
In Stock
Extech 407026 Heavy Duty Light Meter
Heavy duty light meter with PC interface
$199.99
E+E EE820 CO2 Transmitter
Dual wavelength non-dispersive infrared technology (NDIR), auto calibration, ranges up to 10000 ppm
$393.00
Yokogawa 510 Series Lux Meters
High performance digital lux meters with good oblique incident light characteristics
$1,155.00
Gems FT-210 Series Turbine Flow Meter
Proven turbine technology in a small package for low flow applications
$119.00
Testo 535 Ambient CO2 Monitor
Highly accurate 2 channel infrared sensor carbon dioxide monitor with a 0 to 9,999 ppm measuring range
$582.00
$523.80
Extech HD400 / HD450 Light Meter
Fast reading light meter with a 40-segment bar graph and data logging capabilities
$247.49
Alicat Scientific Whisper MCW Series Mass Flow Controller
Low pressure drop flow controller for use in systems with very low differential pressure availability
$1,520.00
TSI Alnor IAQ-CALC 7515 CO2 Monitor
Cost-effective handheld meter for carbon dioxide (CO2) measurements
$645.00
$580.50
Horiba LAQUAact PH-110 pH / ORP Meter
IP67 protection, -2.00 to 16.00 pH measurements, ±2000 mV ORP measurements
$575.00
Brooks Model 1306 Variable Area Flow Meter
Glass tube variable Area flow meter, o-ring seal construction, up to 590 gph & up to 39 scfm
$630.98
Alicat Scientific Whisper MWB Series Mass Flow Meter
Portable, rechargeable mass flow meter with low pressure drop for use in systems with very low differential pressure availability
$1,470.00
Extech LT40 LED Light Meter
Measure LED and Standard Lighting in Lux or Foot-Candle (Fc) units, 4000 count display,
$119.99
In Stock
E+E EE870 Modular CO2 Transmitter
Interchangeable CO2 probe incorporates the dual wavelength NDIR CO2 sensor, measuring range up to 5% CO2 (50,000 ppm)
$653.00
E+E EE33 Humidity / Temperature Transmitter
Designed for high humidity and chemical applications, monolithic measurement cell type, pressures up to 1450 psi
$1,363.00
Testo 545 Light Meter w/ Data Logger
Log up to 3,000 readings and calculate the mean value with the touch of a button
$420.00
$378.00
Extech 401025 Foot Candle / Lux Meter
Candle/Lux meter with analog output and fast/slow response feature
$149.99
Dwyer EMMA Environmental Monitor
Combines humidity, temperature, air velocity, air flow, sound and light measurements into one easy to use instrument
$362.00
Brooks SLAMf Series Thermal Mass Flow Meters
Highly configurable platform, 0.003 up to 2500 lpm flow ranges, NEMA4X / IP66 rated enclosure
$2,073.65
HOBO MX2501 pH and Temperature Data Logger
Long-term monitoring of pH in both freshwater and saltwater environments
$695.00
Seametrics SEB Series Turbine Flow Meter
Metal-bodied turbine flow meter for in-line clean water applications, replaces ES45-BSING
$385.00
Alicat Scientific MQ Series Mass Flow Meters
An extremely fast, accurate mass flow meter with no warm-up time, unparalleled versatility for inlet pressures up to 320 psia
$1,315.00
Setra SRH Humidity Transmitter
Wall mount, duct mount, and outside air humidity transmitters
$139.71
Alicat Scientific P Series Pressure Gauge
Precision digital pressure gauge for applications requiring high accuracy and signal output
$610.00
Seametrics IP150/250 Series Hot-Tap Paddlewheel Flow Sensor
Adjustable depth paddlewheel flow sensor with hot-tap feature
$902.00
E+E EE061 Humidity / Temperature Probe
4-20 mA output for humidity and a passive temperature output, polycarbonate IP65 housing
$194.00
Amprobe LM-120 Light Meter with Auto-Ranging
Auto-ranging light meter that measures indoor illumination levels to maximize lighting efficiency
$159.95
Alicat MCD Series Bidirectional Mass Flow Controller
Controls mass flow rate, volumetric flow rate and pressure of process gases in two flow directions, corrosion resistant and low pressure drop models available
$1,870.00
MadgeTech Element CO2 / RH / Temperature Data Logger
Wireless CO2, Humidity & Temperature Data Logger, up to 200,000 ppm, digital display, USB interface
$799.00
In Stock
Dwyer 1205B CO/CO2 Gas Analyzer
Handheld CO/CO2 gas analyzer with sampling probe and hose for indoor air quality applications
$1,405.00
Extech SDL400 Light Meter
Light meter and data logger with wide range to 10,000Fc or 100kLux, cosine and color-corrected measurements
$315.99
In Stock
ACI A/RH Series Relative Humidity & Temperature Transmitter
Combination relative humidity and temperature transmitter with analog outputs
$283.70
Mensor CPG2300 Barometer
Portable high accuracy barometer with a barometric range of 8 to 17 PSI (17 to 34inHgA)
$2,183.00
Brooks GF135 Thermal Mass Flow Controller
Pressure transient insensitive mass flow controller with real-time flow error detection and advanced diagnostics
$3,695.00
Brooks GF80 / GF81 Mass Flow Controllers
Digital mass flow controllers and meters, metal seals, multiflo capabilities, flow ranges from 3 sccm up to 300 slm
$2,430.00
Brooks GF101 / GF121 / GF126 Mass Flow Controllers
High purity & ultra-high purity high flow digital flow devices, flow rates up to 300 slpm, corrosion resistant hastelloy C-22 sensor tube
$2,940.00
Extech EA33 EasyView Light Meter
Store and recall up to 50 measurements ranging to 999,900Lux with built-in memory
$289.99
Delmhorst F-2000/H Moisture Meter
Digital meter specifically designed for hop producers looking to enhance quality control
$335.00
In Stock
Amprobe LM-200LED Light Meter
Professional tester specifically designed to accurately measure light output from LED sources
$129.95
Seametrics SES Series Turbine Flow Meter
Single-jet turbine flow meter in an extremely rugged stainless steel package
$1,170.00
E+E EE85 CO2 Switch
Duct mount, non-dispersive infrared (NDIR) technology, measuring range up to 10000 ppm
$294.00
E+E EE80 CO2 Switch
Non-dispersive infrared technology (NDIR), measuring ranges up to 5000 ppm, auto-calibration
$238.00
Extech 45170CM Environmental Meter
Convenient 5-in-1 Environmental Meter measures Air Velocity, Air Flow, Humidity, Temperature, and Light.
$229.99
Laurel Laureate RTD Panel Meter
Highly accurate and repeatable panel meters factory calibrated for Pt 100, Pt 100 ANSI, Ni 120 and Cu 10 RTDs
$230.00
Laurel 88-PRO Panel Meter
Loop powered process meter with a jumper-selectable display range of up to ±199900
$130.00
Horiba LAQUA DS-72 Series Benchtop pH/Water Quality Analyzer
Touch-panel, troubleshooting navigation, customizable auto-hold function, USB PC Communication
$1,460.00
Laurel Laureate Thermocouple Panel Meter
Factory calibrated to read type J, K, T, E, N, R and S thermocouples with exceptional accuracy and repeatability
$230.00
E+E Omniport 30 Multi Function Monitor
Handheld, continuous and single-point data logging, 23 parameters, capacitive TFT touch-screen
$845.00
E+E EE871 CO2 Probe
CO2 probe with Modbus RTU interface, measuring range up to 5% CO2 (50,000 ppm), dual wavelength NDIR principle
$537.00
Isotech PRT Probe
300 mm PRT for temperatures from -50°C to 250°C
$456.00