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HMP1 - Indoor environmental measurement
Vaisala HUMICAP® Humidity and Temperature Probe HMP1 is designed for indoor environmental measurement. The HMP1 can be connected directly to Indigo200 series transmitters to form a wall-mounted unit. The probe head and housing are integrated into a single unit. The miniature 5 mm diameter HUMICAP® sensor and head ensure high stability and fast response time.
Features:
- Probe for wall mounting
- Accuracy up to ±1 % RH and up to 0.2 °C
- Temperature measuring range from -40 °C to +60 °C
- Sensor cleaning for excellent chemical resistance
- Modbus RTU via RS-485
- Includes certificate for traceable calibration:
6 points humidity, 1 point temperature
Data sheet HMP1
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HMP3 - for industrial applications with moderate humidity and temperature
The HMP3 is suitable for various industrial applications with moderate humidity and temperature in industrial HVAC systems, paint booths, clean rooms and climate chambers.
Features:
- Accuracy up to 0.8 % RH and up to 0.1 °C
- Temperature measuring range -40 °C ... +120 °C
- Compatible with the Indigo transmitter series
- PPS plastic grid filter with stainless steel mesh as standard
- Modbus RTU via RS-485 for flexible connectivity
- Includes certificate for traceable calibration
Data sheet HMP3
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HMP4 - for high-pressure applications such as compressed air systems in marine, breathing air and industrial applications
Features:
- Measuring accuracy up to 0.8 % RH and up to 0.1 °C
- Temperature measuring range from -70 °C to +180 °C
- Operating pressure range 0 to 10 MPa (0 to 100 bar)
- Sensor cleaning for excellent chemical resistance
- Modbus RTU via RS-485
- Plug-and-play compatible
- Traceable calibration certificate:
5 points for humidity, 1 point for temperature
Data sheet HMP4
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HMP5 - for high-temperature applications such as industrial ovens
Properties
- Measuring accuracy up to 0.8 % RH and up to 0.1 °C
- Temperature measuring range from -70 °C to +180 °C
- 250 mm probe length for easy installation through insulating materials
- Sensor cleaning for excellent chemical resistance
- Modbus RTU via RS-485
- Plug-and-play compatible
- Traceable calibration certificate:
5 points for humidity, 1 point for temperature - AISI316L sintered filter included as standard
Data sheet HMP5
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HMP7 - for applications with constantly high or rapidly changing humidity
..., e.g. in drying and test chambers, combustion air and other humidifiers as well as meteorological measurements.Features:
- Accuracy up to 0.8 % RH and up to 0.1 °C
- Temperature measuring range from -70 °C to +180 °C
- Steam and pressure-resistant construction
- Heating function minimizes condensation on the sensor
- Sensor cleaning for excellent chemical resistance
- Plug-and-play compatible
- Modbus RTU via RS-485
- Traceable calibration certificate:
6 points for humidity, 1 point for temperature
Data sheet HMP7
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HMP8 - designed for pressurized processes
...such as compressed air systems, refrigeration dryers and other industrial compressed air applications.Features:
- Humidity accuracy up to 0.8 % rH, temperature accuracy up to 0.1 °C
- Temperature measuring range -70 °C ... +180 °C
- Sensor cleaning for excellent chemical resistance
- Freely selectable installation depth of the probe. A ball valve allows the probe to be removed from pressure lines during operation
- Modbus RTU via RS-485
- Plug-and-play compatible with the Indigo™ transmitter series
- Traceable calibration certificate: 5 points for humidity, 1 point for temperature
Data sheet HMP8
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HMP9 - fast response time and chemical resistance
Properties
- Mini probe head with small storage mass for outstanding response time
- Measuring accuracy up to 0.8 % RH and up to 0.1 °C
- Temperature measuring range from -40 °C to +120 °C
- Sensor cleaning for excellent chemical resistance
- Modbus RTU via RS-485
- Traceable calibration certificate:
6 points humidity, 1 point temperature - M10×1.5 cable gland for mounting the probe head included in the scope of delivery
Data sheet HMP9
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TMP1- for demanding temperature measurements, e.g. in the pharmaceutical industry and in calibration laboratories
Features
- Mini probe head with small storage mass for outstanding response time
- Measuring accuracy up to 0.8 % RH and up to 0.1 °C
- Temperature measuring range from -40 °C to +120 °C
- Sensor cleaning for excellent chemical resistance
- Modbus RTU via RS-485
- Traceable calibration certificate:
6 points humidity, 1 point temperature - M10×1.5 cable gland for mounting the probe head included in the scope of delivery
Data sheet Vaisala TMP1

Vaisala Indigo transmitter in combination with flexibly interchangeable sensors
Standalone application or in combination with Vaisala Indigo
Indigo and Insight compatible
The probe can be connected to Vaisala Indigo transmitters and the Indigo80 handheld device to extend the range of available functions.
Unique advantages of the HUMICAP sensor
Vaisala moisture meters with HUMICAP sensors are suitable for a wide range of applications. From power generation and steel production to life sciences and building automation, moisture measurement is required in many industries.
- Excellent long-term stability
- Insensitive to dust and most chemicals
- Chemical cleaning function for stable measurements in environments with high concentrations of chemicals
- Sensor heating for measurements even in condensing environments
- Full recovery after condensation

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