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Home  >>  Products  >>  Moisture/Air/Temperature  >>  HT-4000 Thermo-Hygrometer

HT-4000 Thermo-Hygrometer

Conforms to ASTM F-2170

HT-4000 Thermo-Hygrometer

The HT-4000 is a versatile, stand-alone thermo-hygrometer for flooring installers and restoration contractors. The advanced RH/T sensor acclimates quickly to ambient temperature and humidity.

For contractors who prefer having separate meters to one combination meter, the HT-4000 is the perfect solution. The meter’s sensor is also detachable, making it ideal for testing a concrete slab according to the ASTM F-2170 standard or for monitoring the relative humidity of the air in a structure.

With the ASTM F-2170 standard gaining widespread acceptance from flooring manufacturers and installers, it’s more important than ever to be prepared with the right tool for the job. Checking the RH of a concrete slab before installing a floor covering can mean the difference between a successful installation, or one that requires costly callbacks.

For restoration contractors on a water loss, the HT-4000 can provide valuable information to guide your drying process. Using the HT-4000 and a moisture meter during the drying cycle will allow you to sign off with confidence that the structure is dry.



  • RH Sensor - conforms to ASTM F-2170 standard for in-situ concrete testing (range 0 to 100%)
  • Temperature range - -40°F to 255°F (-40°C to 124°C)
  • Built in Back-light makes reading in drak places a cinch
  • Dew Point range -40°F to 176°F (-40°C to 80°C)
  • GPP range 0.1 to 3820 GPP (Grains Per Pound)
  • GPK range 0.01 to 545 GPK (Grains Per Kilogram)
  • Vapor Pressure range 0 to 7 PSI (Pounds Per Square Inch)
  • Auto-shutoff timer saves battery life
  • Reading HOLD Feature
  • Rugged construction ensures years of reliable use
  • Sturdy plastic carrying case
  • 9-V Battery
  • 1 year warranty



Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices

Meter, (1) RH/T-S1 sensor and Carrying case

Flooring Package - Meter, (2) RH/T-S1 sensors, (5) CS-2 Concrete sleeves for testing in multiple sites, (1) RH/T-S3 cable for easy reading while sensor is in concrete and Carrying case
WE-210201 HT-4000 $572.00
WE-210207 HT-4000 Flooring Package 704.00
MO-RH/T-S1 RH/Temp sensor for HT-4000 96.00
MO-RH/T-C1 S/A - cable - for HT-4000 66.00
MO-324CAS-0098 Die-Cut Carrying Case for HT-4000 w/CS 35.00
MO-324CAS-0103 Large Carrying Case that comes with HT-4000/PKG 60.00
WE-403SAL-0001 Salt Solution - RH - 75% 149.00
WE-403SAL-0002 Salt Solution - RH - 33% 149.00


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