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

 

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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 reliably is challenging in environments where humidity is near saturation. Measurements may be corrupted by fog, mist, rain, and heavy dew. A wet probe may not give an accurate measurement in the ambient air. This is an environment to which Vaisala has designed this patented, warmed probe for reliable measurements. 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.

Vaisala HUMICAP Humidity and Temperature Probe HMP155 provides reliable humidity and temperature measurement. It is designed especially for demanding outdoor applications. HMP155 uses the proven Vaisala HUMICAP180R sensor that has 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 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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