Humidity Probe

Model PMA2170 Digital Relative Humidity, Dew Point, and Ambient Temperature Probe

Solar Light’s Model PMA2170 Digital Probe is an accurate professional-grade instrument for measuring relative humidity, dew point, and ambient temperature.



Solar Light’s Model PMA2170 Digital Probe is an accurate professional-grade instrument for measuring relative humidity, dew point, and ambient temperature. A memory chip is embedded into the probe to store its signal processing, dew point calculator, and unit conversion program.

The relative humidity is the ratio of the actual vapor pressure to the saturation vapor pressure at a given air temperature, expressed in percent. Relative humidity displays an inverse relationship with absolute temperature when the vapor pressure is held constant. Dew point is the temperature the air would have if it were cooled (at constant pressure and water vapor content) until saturation (or condensation) occurred.

  • Flat spectral response measurements
  • IR applications
  • Demonstration Reference measurements

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0 to 100% RH

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-40 to +60°C

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0.1°F, 0.1°C, 0.1K, 0.1%RH

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±3% RH

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Better than 1% per year

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6 ft (1.82m) Straight Cable

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Handle - 1" (25.4mm)
Sensor - 0.47" (12mm)

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Humidity SENSOR PMA2170

Interfacing PMA detectors to a Campbell data logger

PMA Series capabilities and applications

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SOLAR LIGHT COMPANY warrants that the equipment has been carefully tested, inspected and left the Factory in proper working condition, free of visible defects.  SOLAR LIGHT COMPANY warrants the equipment to be free from defects in material and workmanship, under normal use and operation, for a period of one (1) year after the date of initial operation, or demonstration; or eighteen (18) months from the date of shipment from the Factory; or whichever occurs first. The warranty is limited to the free replacement of all-defective parts and free labor during the first year of warranty.  Defective parts replaced under this warranty shall become the property of SOLAR LIGHT COMPANY. The above stated Warranty is subject to the following conditions: Equipment being installed within the United States of America, Canada, or sold by authorized SOLAR LIGHT COMPANY representatives or their agents outside the continental United States. The equipment being installed is operated and maintained in accordance with SOLAR LIGHT COMPANY’s operating instructions, maintenance instructions and specifications. Utilization of only SOLAR LIGHT COMPANY’s authorized parts and components.  The utilization of a duly authorized representative for all work performed on SOLAR LIGHT COMPANY equipment during the warranty period.  Any variation(s) to the above warranty must be in writing and mutually acceptable by SOLAR LIGHT COMPANY and the customer. The warranty shall not apply to damages resulting from errors in installation, nor shall it apply to any equipment, which has been subject to damages, alterations or misuse by the purchaser.  Parts of the equipment, which would be generally considered as expendable service items during normal use, such as fuses, lamps, detector shields, etc., are not covered under the warranty. THERE ARE NO WARRANTIES, WHICH EXTEND BEYOND THIS DESCRIPTION, AND EXPRESSLY NO IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SOLAR LIGHT COMPANY BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR ANTICIPATED LOSS OF PROFITS SUFFERED BY THE PURCHASER. Extended Warranty Plans are also available.