Features:
- Microprocessor Based Instruments
- Measures Relative Humidity and Temperature
- Calculates Dewpoint Temperature and Absolute Humidity
The Vaisala HMP230 Series Humidity and Temperature Transmitters are microprocessor based instruments for the
measurement of relative humidity and temperature; from these variables they
can calculate dewpoint temperature, absolute humidity, mixing ratio, wet bulb
temperature and enthalpy. The transmitters have two analogue outputs and
they can be connected to a serial bus via the RS 232C interface or through an
RS 485/422 serial module or a current loop module. At dewpoint temperatures
below 0°C, the user can select whether the transmitter calculates dewpoint or
frostpoint reading; as default, the transmitter calculates dewpoint.
The HMP233 Vaisala Humidity and Temperature Transmitter may still be available for purchase and support from Artisan Technology Group beyond End-Of-Life (EOL) by the manufacturer (OEM).
Functions
Digital transmitter that measures relative humidity and temperature using capacitive humidity sensor and platinum RTD temperature sensor. Provides 4-20 mA analog outputs for both parameters with configurable measurement ranges. Features field-replaceable probe head with chemical purge capability for harsh environments. Includes temperature compensation algorithms and linearization for accurate measurements across operating range. Supports probe heating function to prevent condensation in high humidity applications. Designed for continuous monitoring in HVAC systems, industrial processes, meteorological stations, and cleanroom environments.
Platforms
Measures relative humidity and temperature using a capacitive thin-film polymer sensor and a platinum resistance thermometer. Features analog voltage or current outputs, serial interface for data logging and configuration, and is designed for duct mounting or use with a radiation shield for outdoor applications. Commonly used in HVAC/environmental monitoring systems.
Applications
Measurement of ambient air temperature and relative humidity in meteorological stations, HVAC systems, industrial process control, environmental monitoring, and cleanroom environments. Designed for integration with control systems and data loggers via analog or digital outputs, enabling real-time monitoring and regulation of climate conditions and ensuring compliance with environmental standards.
Accessories
Power supply 10-30 VDC, mounting clamps, cabling;Interfaces: 8-pin screw terminal for power and analog outputs, RS-232 for service use with 3.5 mm phone jack.
Interfaces
Two 2-wire analog output channels (0/4...20 mA) selectable via DIP switches; RS-232C serial interface through 9-pin D-connector; RS-485 interface option; front panel connector for calibration; M12 sensor connection; optional modular screw terminals for power and signal wiring; internal 16x2 LCD display option; external 24 VAC/DC power supply required; wall or duct mounting options.
Specifications
The transmitter measures relative humidity from 0-100% RH with ±1.0% RH accuracy and temperature from -40 to +60°C with ±0.2°C accuracy using a HUMICAP sensor and Pt1000 RTD. Features 4-20mA analog outputs, Modbus RTU communication, and IP65-rated housing for harsh industrial environments. Operates on 10-35VDC power supply with field-configurable measurement parameters. Designed for HVAC systems, cleanrooms, meteorological stations, and industrial process monitoring where precise humidity and temperature measurement is critical for environmental control and data logging applications.
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Artisan Scientific Corporation dba Artisan Technology Group is not affiliated with or a distributor for Vaisala. The depiction, description, or sale of products featuring names, trademarks, brands, and logos is for identification and/or reference purposes only and does not indicate any affiliation with or authorization by any rights holder.