Vaisala HMP155 Humidity & Temperature Probe

Features

  • Vaisala HUMICAP180R sensor: superior long-term stability
  • Optional warmed humidity probe and chemical purge
  • Plug-and-play
  • USB connection for service use
  • Use with DTR13 and DTR503 radiation shields and a Stevenson screen
  • Weather-proof housing IP66
  • Optional, fast temperature probe
  • Different output possibilities: voltage, RS-485, resistive Pt100

 

 

Enquiry

Dpstar is a leading supplier of environmental measurement sensors for temperature, relative humidity, pressure, dew point, CO2, and other environmental condition monitoring for industrial process application and research. Since the ’90s, we earned a reputation as a trusted partner to our clients through our commitment and dedication. We are an authorized distributor and supplier of measuring sensors solutions from renowned manufacturers Vaisala. Vaisala is a global leader in environmental and industrial measurement. Building on 80 years of experience, Vaisala provides observations for a better world. Vaisala is a reliable partner for customers around the world, offering a comprehensive range of innovative observation and measurement products and services.

Measuring humidity accurately can be tricky in places where humidity levels are high, like during fog, mist, rain, or heavy dew. A wet probe might not provide precise readings in the air around it. Vaisala has developed a patented solution: a heated probe. By keeping the sensor head warm, the humidity inside it stays lower than the surrounding air, reducing the chance of condensation on the probe and ensuring reliable measurements.

Vaisala HMP155 is a humidity and temperature probe known for its dependable measurements. It’s tailored for tough outdoor conditions, featuring the reliable Vaisala HUMICAP180R sensor known for stability and durability. The probe’s sturdy structure and default sintered Teflon filter provide excellent protection against water, dust, and dirt.

Dimension

Applications

  • Meteorology
  • Aviation
  • Road weather
  • Instrumentation

 

Specification

HMP155 Humidity Measurement Performance
Sensor HUMICAPâR2, 180R and INTERCAP for typical applications HUMICAPâR2C, 180RC and INTERCAPC for applications with chemical purge and/or warmed probe
Observation range 0 … 100 %RH
Response time at +20 °C (+68 °F) in still air with sintered Teflon filter 63 %: 20 s
90 %: 60 s
Factory calibration uncertainty at +20 °C (+68 °F) 1) ±0.6 %RH (0 … 40 %RH) ±1.0 %RH (40 … 95 %RH)
Accuracy (including non-linearity, hysteresis, and repeatability)
At +15 … +25 °C (+59 … +77 °F) ±1 %RH (0 … 90 %RH)
±1.7 %RH (90 … 100 %RH)
At −20 … +40 °C (−4 … +104 °F) ±(1.0 + 0.008 × reading) %RH
At −40 … −20 °C (−40 … −4 °F) ±(1.2 + 0.012 × reading) %RH
At +40 … +60 °C (+104 … +140 °F) ±(1.2 + 0.012 × reading) %RH
At −60 … −40 °C (−76 … −40 °F) ±(1.4 + 0.032 × reading) %RH
1) Defined as ±2 standard deviation limits. Small variations possible (see also the calibration certificate).
HMP155 Temperature Measurement Performance
Sensor Pt100 RTD element, Class F 0.1 IEC 60751
Observation range −80 … +60 °C (−112 … +140 °F)
Response time for additional temperature probe in 3 m/s (7 mph) air f low 63 %: < 20 s
90 %: < 35 s
Other measured variables Dew point / frost point temperature, wet bulb temperature, mixing ratio
Accuracy with voltage output
At −80 … +20 °C (−112 … +68 °F) ±(0.226 – 0.0028 × temperature) °C
At +20 … +60 °C (+68 … +140 °F ±(0.055 + 0.0057 × temperature) °C
Accuracy with passive (resistive) output
According to Tolerance Class AA IEC 607511) ±(0.1 + 0.0017 × |temperature|) °C
Accuracy with RS‑485 output
At −80 … +20 °C (−112 … +68 °F) ±(0.176 – 0.0028 × temperature) °C
At +20 … +60 °C (+68 … +140 °F) ±(0.07 + 0.0025 × temperature) °C
1) Tolerance Class AA IEC 60751 corresponds to IEC 751 1/3 Class B
HMP155 Operating Environment
Operating temperature for humidity measurement −80 … +60 °C (−112 … +140 °F)
Storage temperature −80 … +60 °C (−112 … +140 °F)
Operating humidity 0 … 100 %RH
IP rating IP66
HMP155 Inputs and Outputs
Operating voltage 7 … 28 V DC
Minimum operating voltage 0 … 1 V output or RS‑485: 7 V
0 … 5 V output, or warmed probe: 12 V
0 … 10 V output, chemical purge, or XHEAT: 16 V
Outputs Voltage output: 0 … 1 V, 0 … 5 V, 0 … 10 V
Resistive Pt100 4‑wire connection RS‑485
Average power consumption (+15 V DC, load 100 kΩ) 0 … 1 V output: < 3 mA
0 … 10 V output: +0.5 mA
RS-485: < 4 mA
During chemical purge: Maximum 110 mA
With warmed probe: Maximum 150 Ma
Settling time at startup Voltage output: 2 s
RS-485: 3 s
HMP155 Mechanical Specifications
Dimensions (H × W) 279 × 40 mm (10.9 × 1.6 in)
Weight 93 g (3.25 oz)
Length of additional T‑probe cable 2 m (6 ft 7 in)
Connection 8-pin male M12 connector
Connection cables 3.5 m (11 ft 6 in), 10 m (32 ft 10 in), 30 m (98 ft 5 in)
Maximum wire size 0.129 mm2 (26 AWG)
Service cables USB connection cable
MI70 connection cable
Materials
Filter Sintered Teflon or membrane
Housing Polycarbonate (PC)
Additional temperature probe Stainless steel AISI 316L
Cable PUR

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Vaisala HMP155 Humidity & Temperature Probe_DpstarGroup