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The Extech HT30 Heat Stress WBGT Meter is a professional-grade monitoring tool designed for safety officers, industrial hygienists, and outdoor site managers who need to assess heat-related risks accurately. By measuring the Wet Bulb Globe Temperature (WBGT), it provides a comprehensive assessment of thermal stress by accounting for air temperature, humidity, wind, and direct sunlight; however, users should note that the device requires a stabilization period when moving between significantly different environmental conditions to ensure accurate sensor readings.
| Model Part Number | HT30 |
|---|---|
| Brand | Extech |
WBGT stands for Wet Bulb Globe Temperature, a measure of heat stress in direct sunlight which considers temperature, humidity, wind speed, and sun angle.
Yes, the HT30 is effective for indoor environments, though the Black Globe sensor will have minimal impact if there is no significant radiant heat source present.
Refer to the unit selection toggle settings in the device menu to switch between °F and °C.
No, the HT30 does not have onboard memory. Data must be exported in real-time via the RS-232 interface to a connected computer.
Gently wipe the sensors with a dry, soft, lint-free cloth. Do not use chemical solvents or abrasive materials.
The HT30 is not waterproof. Avoid using it in direct rain or high-moisture environments that could damage the internal electronics.
Ensure the device has had at least 10-15 minutes to stabilize in the current environment and verify the sensors are free from dust or obstructions.
Check that the RS-232 cable is securely connected and ensure your computer's COM port settings match the device's baud rate requirements.
Verify if the Auto Power Off function is active and use the override lock feature if you require the meter to stay powered on continuously.
To begin using the HT30, ensure the batteries are fresh and the protective cap is removed from the sensors. For long-term data collection, connect the device to your computer via the RS-232 port; you may need a serial-to-USB adapter if your computer lacks a native serial port.
To maintain the device, keep the sensors clean and free from dust or debris, as these can interfere with humidity and temperature readings. When not in use, store the meter in a cool, dry place within its carrying case. Avoid exposing the sensors to direct impact or extreme moisture, and perform a periodic check to ensure the Black Globe sensor is clean and unobstructed to maintain measurement accuracy.
