Mobicon-Remote Electronic Pte Ltd
50 Ubi Ave 3,
#02-06 Frontier,
Singapore 408866.

H3331 temperature and humidity regulator with RS232 output

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H3331 temperature and humidity regulator with RS232 output Transmitters and Regulators Comet
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code: H3331
Humidistat, thermostat with two relay outputs. Outdoor, indoor use.

Relative humidity, temperature probe on a cable. Measured values are also converted to other humidity interpretation: dew point temperature, absolute humidity, specific humidity, mixing ratio, specific enthalpy. Three two-state inputs.

The device is supplied with T+RH probe with 1m cable. Cable lengths 2m or 4m available optionally.

Included in delivery:

  • H3331 sensor
  • Traceable calibration certificate
  • Quick start manual
  • Technical support at discussion forum

Technical parameters Value
Output RS232
Measured Value Temperature + Relative Humidity
Construction Type With T+RH Probe on Cable
Design Industrial
Temperature Measuring Range -30 to 105 °C
Relay Output Yes
Two-State Input Yes
Lcd Display Yes
PoE No
Maximum switching voltage, current, power of relay output 50V, 2A, 60VA
Audible alarm from built-in beeper - switchable
Relative humidity range 0 to 100%
Accuracy of relative humidity measurement ±2.5% relative humidity from 5 to 95% at 23°C
Accuracy of temperature output ±0.4°C from -30 to +100°C
±0.4% from reading over +100°C
Available temperature units degrees Celsius, Fahrenheit
Accuracy and range of dew point temperature output - for more details see graphs ±1.5°C at ambient temperature T<25°C and RH>30%
range -60 to +80 °C
Accuracy and range of absolute humidity output ±1.5g/m3 at ambient temperature T < 25°C
range 0 to 400 g/m3
Accuracy and range of specific humidity output ±2g/kg at ambient temperature T < 35°C
range 0 to 550 g/kg
Accuracy and range of mixing ratio output ±2g/kg at ambient temperature T < 35°C
range 0 to 995 g/kg
Accuracy and range of specific enthalpy output ±3kJ/kg at ambient temperature T < 25°C
range: 0 to 995 kJ/kg
Signal for binary inputs from voltage-less contact, open collector or two-state voltage signal.
Inputs are not galvanically isolated.
Minimum pulse length at binary input 500 ms
Voltage at open contact 3.3 V
Low voltage level 0 to +0.5 V
High voltage level +3.0 to +30V
Temperature operating range -30 to +80°C
Temperature operating range of LCD display readable to operating temperature +70°C, it is recommended to switch OFF the LCD over +70°C
Temperature compensation of the humidity sensor all temperature range
Filtering ability of sensor cover 0.025mm - filter with stainless steel mesh
Communication protocol ModBus RTU and Advantech ADAM compatible protocol
Communication speed 110 to 115200 Bd
IP protection IP65 electronics, IP40 sensors
Power 9-30Vdc, power consumption approximately 1W
Length of the probe cable 1m, 2m or 4m optionally
Dimensions 136 x 159 x 45 mm (W x H x D), probe length 88 mm, probe diameter 18mm
Weight approximately 500g - 1m probe

Optional accessories

AC/DC adapter 12V/450mA stabilized
Wall holder for external probes DIGIL
plastic sensor protection with stainless filter (black)
PTFE sensor protection, white
sintered bronze sensor cover
PP4 Flat circular flange
PP90 Right-angled stainless steel flange
plastic gland for direct mounting of the humidity probe
Tool for easy connection to WAGO terminals 233 for serial output transmitters
COMETEO Multi-Plate Radiation Shield for Sensors, Naturally Ventilated
Vessel for adjustment and calibration of humidity
Humidity Standard 10%RH, set 5pcs
Humidity Standard 80%RH, set 5pcs
The LD-12 flood detector
The optical smoke detector SD-280
Motion detector JS20
Magnetic door contact SA-200-A
Magnetic door contact with cable length 2m
Magnetic door contact with cable length 5m
Magnetic door contact with cable length 10m
Magnetic door contact with cable length 15m
Magnetic door contact with cable length 20m
Magnetic door contact with cable length 30m
Power detector SP008
Transducer USB/RS232 complete

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