Temperature, relative humidity, and dew point temperature transmitter
■ Four types of outputs: temperature, humidity, temperature + humidity, temperature + dew point temperature ■ High-precision capacitive (humidity) and NTC (temperature) sensors ■ DC 4-20mA, DC 0-10V, or RS485 output ■ Three types of probe shape variations: downward, rear, and separated
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basic information
The MC8D48 and MC8D49 series transmitters measure and calculate temperature, relative humidity, and dew point temperature. Models are available with standard analog signal output only and those with MODBUS-RTU protocol RS485 output only. The analog output models provide analog signals suitable for displays and recorders, while the RS485 output models supply serial signals for connection to PCs or PLCs. The MC8D48 series is an active type transmitter that can be used with both DC and AC power supplies, and offers a choice of standard current output of DC 4-20mA or DC 0-10V, or RS485 output. The MC8D49 series is a passive type that can be used with a 4-20mA current loop. Both the MC8D48 and MC8D49 series are designed for controlling temperature and relative humidity in the HVAC and BEMS fields. A proven capacitive humidity sensor is used for relative humidity, ensuring high accuracy and long-term reliability in measurements. Temperature measurements for both series can be supplied in either the standard measurement range of -20 to +80°C or the extended measurement range of -40 to +150°C.
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Applications/Examples of results
The probe tip is equipped with a stainless steel 20μm protective filter that protects the sensor from dust particles and strong airflow. The transmitter is factory calibrated, and no recalibration or adjustment is necessary before use. Each model can be combined with one of the probe shapes: rear probe for duct insertion (TO), downward probe for wall mounting (TV), or cable-connected separate probe (TC). The standard stem lengths for the probe are 135mm and 335mm. For mounting the transmitter, options such as flange MC8D48-HD900831S and cable gland MC8D48-PG16S are available. By equipping an optional 4-digit LCD display, it is possible to show measurement values in continuous or alternating display mode for temperature or humidity. It can be used in various industries and civilian applications, including pharmaceutical factories, museums, clean rooms, ventilation ducts, kitchens and dining halls, auditoriums, sports gyms, farm facilities, and more.
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