Extech Instruments RH390-NIST Precision Dual Display Hygro Thermometer Psychrometer with NIST

Amazon Price: $325.00 (as of April 6, 2019 10:04 am – Details). Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on the Amazon site at the time of purchase will apply to the purchase of this product.

Precision Psychomotor that features the highest 2% RH accuracy with fast 30 seconds response time. This product is NIST Certified which indicates that the product is traceable to standards provided by the National Institute of Standards and Technology (NIST).