2. Product overview
HMP series probes are humidity and temperature measurement probes with a digital output
(Modbus protocol). The probes are designed for demanding humidity and temperature
measurement applications. The probes have a two-part structure, with measurement
electronics contained in the probe body and sensor(s) in the probe head. The probe body and
the probe head are connected by a cable. Length options for this connecting cable depend on
the probe model.
The probes are compatible with Vaisala Indigo transmitters. They can also be connected to
Vaisala Insight software for configuration, calibration, adjustment, diagnostics, and temporary
online monitoring.
2.1 Probe structure
Figure 1 Probe parts
1 Protection cap (remove before use)
2 5-pin M12 connector
3 Probe body with type label
4 Status indicator:
Green Power on and probe online,
flashes when communicating
Red Error
O Power o or indicator
disabled
5 Probe cable (do not cut)
6 Probe head (HMP7 model shown)
7 Location of sensor(s) on the probe
head. Most probe models have a
removable filter over the sensors that
can be replaced if it gets dirty or
damaged. Note that HMP9 and TMP1
do not have a removable filter.
8 Protection cap (remove before use)
2.2 Basic features and options
• Comprehensive list of output parameters. For example: relative humidity, temperature,
dew point temperature, wet-bulb temperature, absolute humidity, mixing ratio, water
vapor pressure, enthalpy. See Output parameters (page 10).
• Sensor purge provides superior chemical resistance (HMP models only)
• Probe and sensor warming functions minimize condensation on probe (HMP models only)
Chapter 2 – Product overview
9
陕西威瑞仪器仪表有限公司 生产代理销售：实验检测设备 气象科学仪器设备
Tel:029-88186182 Web:www.xavery.cn Email:sxvery@163.com
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