HMP155 Humidity & Temperature Probe


Catalog excerpts

HMP155 Humidity & Temperature Probe - 1

HMP155 Humidity and Temperature Probe HMP155 with an additional temperature probe and optional Stevenson screen - superior long-term stability Optional warmed humidity probe and chemical purge radiation shields and also for a Stevenson screen Optional, fast temperature Different output possibilities: voltage, RS-485, resistive PtIOO Applications: meteorology, aviation and road weather, The Vaisala HUMICAP® Humidity and Temperature Probe HMP155 provides reliable humidity and temperature especially for demanding outdoor Long-term Stability excellent stability and withstands well harsh environments. The probe structure is solid and the sensor is protected by default with a sintered teflon filter, which gives maximum protection against liquid water, Warmed Probe and High Humidity Environment Measuring humidity reliably is where humidity is near saturation. by fog, mist, rain, and heavy dew. A wet probe may not give an accurate This is an environment to which Vaisala has designed a patented, warmed probe for reliable measuring. As the sensor head is warmed continuously, the humidity level inside it stays below the ambient level. Thus, it also reduces the risk of condensation forming on the probe. Fast Measurements With its fast response time, the additional temperature probe for the in environments with changing filter speeds up the RH measurement. Long Lifetime Protecting the sensor from scattered and direct solar radiation, and precipitation will increase its lifetime. Thus, Vaisala recommends installing additional temperature probe, an used with DTR502 radiation shield. Easy Maintenance The probe can be calibrated using a pc with a USB cable, with the push buttons, or with the MI70 indicator.

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HMP155 Humidity & Temperature Probe - 2

Technical Data RELATIVE HUMIDITY Measurement range Accuracy (incl. non-linearity, hysteresis Factory calibration * Defined as ±2 standard deviation limits. Small variations possible, see also calibration certificate. Recommended humidity sensor HUMICAP®180R(C) Response time at +20 °C in still air with a sintered PTFE filter Accuracy with voltage output at passive (resistive) output Accuracy over temperature range (opposite) Temperature sensor PtlOO RTD Class F0.1 IEC 60751 Response time with additional temperature OTHER VARIABLES dew point/frost point temperature, wet bulb temperature,...

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