one 9 V battery and carrying case
Precision capacitance humidity sensor offers fast response. Slim design with rubberized sides for better grip and easy, one-handed operation. The dual LCD provides simultaneous display of humidity and temperature, or humidity and dew point, or humidity and wet bulb. Advanced features include data hold, min/max readings, low-battery indication, and auto power off.
Reviewed by 1 customer
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Comments about Extech RH390 Precision Thermohygrometer, 0 to 100% RH/, -22 to 199F:
Our company uses this product for attic inspections. The quick readings are incredibly helpful and essential to inspecting in a timely manner.
Do you have questions about this product?
Get answers from real customers and in-house experts with AnswerBox.
Q:Is this unit able to be calibrated and does it come with a certificate?
A:This product can be calibrated to meet the standards provided by the National Institute of Standards and Technology (NIST), with the addition of P/N: 17005-00.
Q:is this device has a charger?
A:No, this item takes standard 9V batteries, there is no AC adapter currently available.
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