HT 70 - Measurement PCE Instruments - Free user manual and instructions
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| Product Type | Digital Thermo-Hygrometer |
| Measurement Parameters | Relative Humidity and Air Temperature |
| Humidity Measurement Range | 0 to 100 % RH |
| Temperature Measurement Range | -10 to 50 °C |
| Humidity Accuracy | ±3.5 % RH (10 to 90 % RH) |
| Temperature Accuracy | ±0.5 °C |
| Resolution | 0.1 % RH, 0.1 °C |
| Display | Large LCD screen with multiple indicators |
| Data Hold | Yes, freezes the current reading |
| Auto Power Off | Yes, after approximately 15 minutes of inactivity |
| Power Supply | One 9V block battery, 6F22 type |
| Dimensions | Approx. 150 × 50 × 25 mm |
| Weight | Approx. 100 g (without battery) |
| Additional Functions | Min/Max recording, dew point, wet bulb temperature |
| Sensor Type | Electronic capacitive polymer sensor for humidity |
| Maintenance | Clean the sensor with a soft brush, do not use solvents |
| Safety | Do not expose to extreme temperatures or direct sunlight |
| Spare Parts and Repairability | Battery and sensor are replaceable; calibration service available |
| General Information | Ideal for HVAC, cleanrooms, and environmental monitoring |
Frequently Asked Questions - HT 70 PCE Instruments
How do I measure humidity accurately?
To measure humidity accurately, place the HT 70 in the desired environment and allow the sensor to stabilize for 15 to 20 minutes. Avoid direct sunlight and keep the device away from heat sources or air drafts during measurement.
What is the ideal position for the HT 70 sensor?
The sensor should be held vertically and away from walls or surfaces that could condense moisture. The ideal height is 1 to 1.5 meters above the floor, representing the breathing zone.
How do I switch between Celsius and Fahrenheit?
Press and hold the UNIT key for 3 seconds to toggle between °C and °F. The selected unit will appear on the LCD display.
Can I measure dew point?
Yes, the HT 70 includes a dew point function. Press the DEW key to display the calculated dew point temperature based on current humidity and temperature readings.
How do I replace the battery?
Turn off the device and unscrew the battery compartment cover on the back. Remove the old 9V battery, connect the new one to the snap terminal, and replace the cover. Ensure the battery is correctly polarized.
What does the data hold function do?
The HOLD function freezes the current measurement on the display so you can record it comfortably. Press HOLD to activate, and press again to release.
How often should I calibrate the device?
For accurate readings, calibrate the HT 70 every 6 to 12 months using a salt calibration kit or send it to a professional calibration laboratory.
Can the device be used outdoors?
Yes, the HT 70 is portable and can be used outdoors, but it is not weatherproof. Protect it from direct rain and high humidity extremes beyond its specified range.
Why is the humidity reading unstable?
Unstable readings may be caused by the sensor being dirty, exposure to electromagnetic interference, or the device being used in areas with rapid airflow changes. Clean the sensor and wait for the reading to stabilize.
How do I clean the device?
Wipe the outer casing with a soft dry cloth. For the sensor, use a soft brush or compressed air to remove dust. Do not use solvents or immerse the device in liquid.
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USER MANUAL HT 70 PCE Instruments
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Product information
Brand : PCE Instruments
Model : HT 70
Category : Measurement