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Air Measurement
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Reliability Direct, Inc. offers a wide variety of instrumentation and tools for the HVAC/R industry. These include Air Measurement instruments that accurately measure air flow, air velocity, air volume, air temperature, air humidity, psychrometers, air pressure, air quality, CO and CO2 and more.

In addition, essential tools from industry leaders such as Extech Instruments, Test Products International , and SKF such as multimeters, borescopes, refrigerant leak detectors, refrigerant recovery and charging, gas detectors and analyzers, etc. are provided for HVAC technicians and home inspection.



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AN100 CFM/CMM Thermo-Anemometer Extech AN100 CFM/CMM Thermo-Anemometer

Large display of Airflow or Air Velocity

  • CFM/CMM Thermo-Anemometer
  • Simultaneous display of Air Flow or Air Velocity plus Ambient Temperature
  • Easy to set Area dimensions (cm2) are stored in the meter?s internal memory for the next power on
  • 20 point average for Air Flow 3% velocity accuracy via low friction

Our Price: $179.99
Extech HD300 CFM/CMM Thermo-Anemometer Extech HD300 CFM/CMM Thermo-Anemometer

Built-in IR Thermometer
Measures non-contact surface temperatures of objects unsafe or difficult to reach
  • InfraRed Thermometer measures remote surface temperatures to 932F (500C) with 30:1 distance to spot ratio and Laser pointer
  • Simultaneous display of Air Flow in CFM/CMM or Air Velocity plus Ambient Temperature
  • Easy to set Area dimensions are stored in the meters internal memory for the next power on

Our Price: $269.99
406800 Differential Pressure Manometer (5psi) with PC Interface Extech 406800 Differential Pressure Manometer (5psi) with PC Interface

Measures Gauge/Differential Pressure from 0 to 138 inH20 (inches of water)
With 0.1in H20 resolution
  • 11 selectable units with Max/Min recording and Relative time stamp
  • Compensated temperature range 32 to 122F (0-50C)
  • Data Hold, Auto power off, and Min/Max functions

Our Price: $199.99
TPI-565C1 Hot Wire Anemometer TPI-565C1 Hot Wire Anemometer


Digital hot wire anemometer and temperature

  • Hot wire anemometer is required to accurately measure below 80 feet/minute
  • Measure air velocity and temperature simultaneously
  • Record & recall Max, Min, & Avg
  • Data hold
  • Auto power off (10 min.)
  • Low battery display
  • Multiple measuring units: (m/s, k/h, mile/h, knots, ft./min)
  • Download to a computer using the RS-232 port and optional A500 cable
  • 39 cable length, hard-wired

Our Price: $169.95
RH101 HygroThermometer Plus IR Thermometer Extech RH101 HygroThermometer Plus IR Thermometer

Humidity, Air Temperature Plus IR for Non-Contact Temperature Measurements

  • Combination Humidity meter plus InfraRed Thermometer features a super large backlit dual display
  • InfraRed thermometer has built-in laser pointer and an 8:1 distance to target ratio
  • Remote humidity sensor with 39" (1m) coiled cable provides readings for both humidity and ambient temperature
  • Auto power off Data Hold and MAX

Our Price: $169.99
EA80 Indoor Air Quality / DataLogger Extech EA80 Indoor Air Quality / DataLogger

Indoor Air Quality Meter/Datalogger

  • Measures CO2 , Temperature, Humidity, Dew Point, and Wet Bulb
  • Checks for Carbon Dioxide (CO2) concentrations
  • Maintenance free dual wavelength NDIR (non-dispersive infrared) CO2 sensor
  • Measurement range: CO2: 0 to 6,000ppm Temperature: -4 to 140F (-20 to 60C)
  • Humidity: 10 to 95%RH
  • Continuous (20,000 sets) or Manual (99 sets) datalogging
  • Complete with (6) AAA batteries, RS-232 cable, and Windows? 95/98/NT/2000/ME/XP compatible software

Our Price: $809.00
RH350 Datalogging Superheat Psychrometer Extech RH350 Datalogging Superheat Psychrometer

Superheat differential measurements: T1-T2, Air-T1, T1-Dewpoint

  • Simultaneous display of %RH, Temperature and Dew point or Wet Bulb or External Probe Temperatures
  • Built-in RS-232 interface (optional RS-232 cable) - uses Windows Hyperterminal to download data to a PC
  • Memory stores up to 99 data records
  • Temperature-K Probes and Calibration Salts are optional (see RH355 kit)

Our Price: $139.99
Extech HD500 Psychrometer with Infrared Thermometer Extech HD500 Psychrometer with Infrared Thermometer

3-in-1 combination meter
Combines the functions of a Humidity Meter, Type K Thermometer, and InfraRed Thermometer for non-contact surface Temperature measurement
  • Built-in InfraRed Thermometer for non-contact temperature measurement to 932F (500C) with 30:1 distance to target ratio
  • Type K Temperature function for contact temperature measurement to 2501F (1372C)
  • Highest 2% RH accuracy

Our Price: $269.99
TPI-1008 CO2 and Temperature IAQ Meter TPI-1008 CO2 and Temperature IAQ Meter

TPI Model 1008 Indoor Air Quality Meter

  • Measure and display carbon dioxide (CO2) and temperature.
  • The TPI 1008A Indoor Air Quality (IAQ) Meter is a state of the art,easy to use tester designed to provide you with the necessary measurements to monitor and make adjustments to air handling devices.
  • The 1008A IAQ meter uses state of the art sensors to measure carbon dioxide (CO2), and temperature.
  • Print via I/R to optional printer (Model A740)

Our Price: $695.95