SenTec

SEM234 Large LCD 485 temperature and humidity recorder

SEM234 Built-in memory, real-time recording of temperature and humidity data, up to 65,535 groups can be recorded; It has 2 channels of switch signal output, which can be associated with alarm events. Set various alarm parameters, communication parameters, time and date, etc. through the LCD button;

SEM234 Built-in memory, real-time recording of temperature and humidity data, up to 65,535 groups can be recorded; It has 2 channels of switch signal output, which can be associated with alarm events. Set various alarm parameters, communication parameters, time and date, etc. through the LCD button;
SEM234 Large LCD 485 temperature and humidity recorder Built-in temperature and humidity alarm function, which can set the upper and lower limits of the temperature and humidity alarm and the hysteresis setting;10~30V wide power supply voltage input, RS485 signal output, multiple recording modes, the longest communication distance can reach 2000 meters.

Parameters

Items

Parameter

DC power supply (default)10~30V DC
Maximum power consumption0.4W
Precision Ahumidity±2% RH (5% RH~95% RH, 25°C)
temperature±0.4°C (25°C)
Precision B (default)humidity±3% RH (5% RH~95% RH, 25°C)
temperature±0.5°C (25°C)
Long-term stabilityhumidity≤1%RH/y
temperature≤0.1°C/y
Response timehumidity≤4s (1m/s wind speed)
temperature≤15s (1m/s wind speed)
Probe operating temperature-40°C~+120°C, default -40°C~+80°C
Probe working humidity0%RH-100%RH
Temperature display resolution0.1 ° C
Humidity display resolution0.1% RH
Temperature and humidity refresh time1S
Transmitter circuit operating temperature and humidity-20°C~+60°C, 0%RH~80%RH
Signal outputRS485 (Modbus-RTU protocol, default address code 1, baud rate 4800, N, 8, 1)
Time and dateBuilt-in clock, real-time display
Alarm functionBuilt-in buzzer, external sound and light alarm, relay optional
Recording interval (minutes)Adjustable interval, default 30 minutes
Record points65535, if recorded by default 30 minutes, can be stored for 4 years
Record modeOff / on / automatic
Storage modeAutomatic loop storage
Installation methodWall-mounted

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