Vaisala HUMICAP® Humidity and Temperature Probe HMP155
Weather-station humidity and temperature probe built on the HUMICAP® 180R sensor for long-term stability outdoors. ±1 %RH and Pt100 temperature, optional warmed probe and chemical purge for near-saturation conditions, voltage, RS-485 or passive Pt100 output, IP66.
Description
HMP155 is Vaisala’s reference probe for meteorological humidity and temperature measurement. Its HUMICAP® 180R sensor is protected by a sintered Teflon filter against water, dust and dirt and keeps its calibration in harsh climates. For tropical sites where humidity sits near saturation, the patented warmed-probe option keeps the sensor head slightly above ambient so fog, mist, rain and heavy dew do not corrupt the reading or leave condensation on the probe. An optional fast-response additional temperature probe suits rapidly changing conditions.
Key features
- Vaisala HUMICAP® 180R sensor with superior long-term stability
- Optional warmed humidity probe and chemical purge for high-humidity environments
- Optional fast-response additional temperature probe (Pt100)
- Voltage (0–1, 0–5, 0–10 V), RS-485 or passive 4-wire Pt100 outputs
- Plug-and-play M12 connector; USB service connection
- Calibration by PC (USB), push buttons or MI70 handheld indicator
- Fits DTR13 and DTR503 radiation shields and Stevenson screens
- Weather-proof IP66 housing
Applications
- Synoptic and automatic weather stations
- Airports and aviation weather
- Road weather information systems
- Agro-meteorology and research instrumentation
Riajati supplies Vaisala instruments in Malaysia — send us your requirements through the Enquiry tab for a quotation.
| Humidity | |
|---|---|
| Observation range | 0–100 %RH |
| Accuracy +15 … +25 °C | ±1 %RH (0–90 %RH), ±1.7 %RH (90–100 %RH) |
| Accuracy −20 … +40 °C | ±(1.0 + 0.008 × reading) %RH |
| Accuracy +40 … +60 °C | ±(1.2 + 0.012 × reading) %RH |
| Factory calibration uncertainty | ±0.6 %RH (0–40 %RH), ±1.0 %RH (40–95 %RH) |
| Response time (+20 °C, sintered filter) | 63 %: 20 s, 90 %: 60 s |
| Sensor options | HUMICAP® R2, 180R, INTERCAP; R2C/180RC/INTERCAPC for warmed probe or chemical purge |
| Temperature | |
| Sensor | Pt100 RTD Class F0.1, IEC 60751 |
| Observation range | −80 … +60 °C |
| Accuracy, passive Pt100 output | ±(0.1 + 0.0017 × |t|) °C (Class AA) |
| Additional probe response (3 m/s) | 63 %: < 20 s, 90 %: < 35 s |
| Calculated variables | Dew/frost point, wet bulb temperature, mixing ratio |
| Inputs and outputs | |
| Operating voltage | 7–28 V DC (12 V min. with 0–5 V or warmed probe; 16 V with 0–10 V, chemical purge or XHEAT) |
| Outputs | 0–1 / 0–5 / 0–10 V, RS-485, passive Pt100 4-wire |
| Power consumption | < 3 mA (0–1 V), < 4 mA (RS-485); max. 150 mA with warmed probe |
| Connector | 8-pin male M12; cables 3.5, 10 or 30 m |
| Environment and mechanics | |
| Operating temperature | −80 … +60 °C |
| IP rating | IP66 |
| Dimensions | 279 × 40 mm |
| Weight | 93 g |
| Materials | PC housing; sintered Teflon or membrane filter; AISI 316L additional T-probe |
| Compliance | CE; EN 61326-1; EN 15518-3:2023 road weather |
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