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Retired Product

This product is no longer available and has been replaced by: HMP60-L. Some accessories, replacement parts, or services may still be available.

Technical Description

The HMP50 measures temperature with a 1000 Ohm platinum resistance thermometer (PRT) and relative humidity (RH) with a 50Y Intercap capacitive chip. The chip is field-replaceable, which eliminates the downtime typically required for the recalibration process. This temperature and RH sensor is compatible with all Campbell Scientific dataloggers.

The HMP50 should be housed in a solar radiation shield—typically the 41303-5A. The 41303-5A 6-plate naturally aspirated shield attaches to a mast, crossarm, or tower leg.

HMP50-L Specifications

  • Supply Voltage: 7 to 28 Vdc (typically powered by datalogger’s 12 V supply)
  • Current Consumption: 2 mA typical
  • Housing Material: chrome-coated aluminum and chrome-coated ABS plastic


Relative Humidity

  • Sensor: Vaisala’s INTERCAP capacitive chip
  • Measurement Range: 0 to 98% RH, non-condensing
  • Accuracy: ±3% (0% to 90% range), ±5% (90% to 98% range)
  • Temperature Dependence: see graph in product brochure


Temperature

  • Temperature Sensor: 1000 ohm Platinum Resistance Thermometer
  • Measurement Range: -40° to +60°C
  • Accuracy: see graph in product brochure

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