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Delmhorst HT‑4000 Thermo‑Hygrometer Flooring Package

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  • Includes RH/T-S3 sensor for concrete testing
  • Humidity range: 0% to 100%
  • Temperature range: -40° to 255°F
  • Dew point range: -40° to 176°F
Availability: Typically in stock (Details)

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Product Information

Designed specifically for flooring installers and inspectors, the HT-4000F from Delmhorst is a rugged and dependable stand-alone thermo-hygrometer. It features the same fast-acclimating RH/T sensor found in the TotalCheck moisture meter, so you can be assured of accurate, reliable results. The sensor on the HT-4000F is detachable, making it ideal for testing concrete slabs according to the ASTM F2170 standard.


The HT-4000F displays readings on a bright, clear digital display that is also backlit, making it easy to see readings in dark or poorly lit areas. An auto shut-off timer helps preserve battery life, so you don't have to worry about turning it off after use. A 9V battery is included.


The HT-4000F also features a convenient data HOLD feature, letting you reach into a difficult-to-access area to take a reading, hold it on the screen, and then bring the meter back to where you can see the information. It's a handy feature designed to make your job easier.


Like all Delmhorst equipment, the HT-4000F is exceptionally durable and designed to withstand the rigors of heavy use by today's flooring and inspection professionals. It comes with a sturdy carrying case to protect the tool during storage and transport too.



  • Temperature Range: -40°F–255°F (-40°C - 124°C)
  • Dew Point Range: -40°F–176°F (-40°C - 80°C)
  • GPP Range: 0.1–3,820 GPP (Grains Per Pound)
  • GPK Range: 0.01–545 GPK (Grains Per Kilogram)
  • Vapor Pressure Range: 0–7 PSI (Pounds Per Square Inch)
  • Vapor Pressure Range: 0–47 KPA (Kilopascals)
  • Relative Humidity Range: 0%–100%, sensor can be used for in-situ concrete testing following the ASTM F2170 standard
  • Size: 8 1/2” x 3 3/8” x 1 3/4”
  • Weight: 11 oz


Flooring Package Includes: 

  • Meter
  • Carrying case
  • (1) RH/T-S3 sensors
  • (1) RH/T-C1 cable for easy reading while sensor is in concrete
  • (10) CS-3 concrete sleeves for testing in multiple sites


More Information
Brand Delmhorst
Category Thermo-Hygrometer
Warranty Information 1-year warranty
Condition New
Manufacturer Model Number HT-4000F/PKG
Thermo-Hygrometer Calculations Dew Point, GPP, Rh, Temp, Vapor Pressure
Thermo-Hygrometer RH Range 0 to 100%
Manual / Schematic