Logging baro-thermo-hygrometer with probe D4141

Comet System
  • Hygro-baro-thermometer
  • MIN, MAX, HOLD function
  • Resolution 0,1 % RH; 0,1 hPa; 0,1 °C
  • Accuracy ±2.5 % RH; ±2 hPa; ±0.4 °C
  • Total capacity of 16000 values
  • PC interface serial RS232


Thermometer, hygrometer, barometer is designed for measurement and datalogging of temperature, relative humidity and atmospheric pressure into the internal non-volatile memory. Also barometric pressure tendency reading available. 

Free PC program enables to transfer recorded data via RS232 serial link to the computer for evaluation. Data logger is connected to the PC through included communication cable only for data trasfer from the memory. During connection with the PC no measurement and record is enabled. 

Thermometer - hygrometer - barometer with external air temperature-humidity probe on a 1 meter cable. Cable lengths 2 and 4 meters available optionally. Probe diameter is 18mm, length 135mm. 


Measured Value
relative humidity + temperature + atmospheric pressure
Temperature Measuring Range
Operating temperature range
Temperature sensor
RTD Ni1000 6180ppm/°C
Barometric pressure tendency reading
In hPa - for last three hours
Battery 9V
Battery life
2 months typically
Real time clock
Year, leap year, month, day, hour, minute, second
PC interface
Serial RS232
Sampling interval in data logging mode
18 adjustable values from 10s to 24hours
Total memory capacity
Up to 16000 recorded values
Data logging modes
Noncyclic - data logging stops after filling the memory
Cyclic - after filling memory oldest data is overwritten by new