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Vaisala HMP155 Humidity and Temperature Probe

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Provides reliable and stable humidity and temperature measurement with the new generation Vaisala HUMICAP® 180R sensor. Especially designed for use in meteorological applications and for a wide range of instrumentation, for example, recorders, data loggers, and laboratory equipment and monitoring.

HMP155 provides reliable humidity and temperature measurement.

New probe for reliability
The new Vaisala HUMICAP® Humidity and Temperature Probe HMP155 provides reliable humidity and temperature measurement.

Long-term stability
The HMP155 has a new generation Vaisala HUMICAP®180R sensor that has excellent stability and withstands well harsh environments. The probe structure is solid and the sensor is protected with a sintered teflon filter, which gives maximum protection against liquid water, dust, and dirt.

Warmed probe and high humidity environment
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 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 temperature measurement
What’s more, with its fast response time, the additional temperature probe for the HMP155 is ideal for measurement in environments with changing temperatures.

Long lifetime
Protecting the sensor from scattered and direct solar radiation, and precipitation will increase its lifetime. Thus, Vaisala recommends installing the HMP155 in one of the following radiation shields: DTR503, DTR13, or a Stevenson screen.

Easy maintenance
The probe can be calibrated using a pc with a USB cable, with the push buttons, or with the MI70 indicator

Applications
The HMP155 is especially designed for use in meteorological applications, such as synoptic and hydrological weather stations, aviation, and road weather. It is also suitable in a wide range of instrumentation, for example, recorders, data loggers, and laboratory equipment and monitoring.

Ordering Information
HMP155A Humidity and temperature probe, 2 voltage outputs( RS485 for service use)
HMP155D Humidity and temperature probe, voltage output for humidity & 4-wire Pt100 RTD output for temperature( RS485 for service use)
HMP155E Humidity and temperature probe, RS485 interface only

Options: Cables to suit HMP155 series:
HMP155CABLE3.5M 3.5m cable with 8 pin M12 female connector
HMP155CABLE10M 10m cable with 8 pin M12 female connector
HMP155CABLE30M 30m cable with 8 pin M12 female connector

Warming/heating and additional temperature probe options
HMP155HEATEDPROBE Warmed probe (only with composite sensor)
HMP155XHEATEDPROBE Warmed probe + Xheat (only with composite sensor)
HMP155ADDITIONALT Additional T-probe with 2m cable upgrade
HMP155H180RC Composite sensor upgrade

Accessories
221040 PC connection cable (USB)
221072 Additional T-probe installation part to DTR502
221069 Additional T-probe installation part to DTR13
221801 MI70 connection cable
221321 Installation kit to Stevenson Screen

Spare parts
220496 Connection Cable 3.5m 8-pin M12
220497 Connection Cable 10m 8-pin M12
220498 Connection Cable 30m 8-pin M12
219452SP Sintered Teflon Filter + O-ring
221318 Protection Set for Calibration Buttons