U3631M IoT T/Rel. Humidity GSM Datalogger with connector for other temp. probes


Comet System


This GSM datalogger is designed to record the temperature and humidity from built-in sensors and temperature from an  external probe.
In case of exceeding the set limits, SMS and JSON messages can be sent out via a GPRS data connection.
The measured values can be sent to the internet storage "COMET Cloud", which is a complete monitoring, alarm and analysis system.

420,00 €

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Environment of Use Indoor
Type of Logger Multicanal
Measured Parameters T/HR
With Display LCD

It is also possible to set the regular sending of JSON messages to a COMET Database. The sending interval is adjustable.
Alarms are also indicated locally by LED, LCD and by an acoustic built-in beeper.
The data recording is performed in a non-volatile electronic memory.
The data can be transferred to a PC via the included USB-C cable.

GSM recorder includes a Traceable calibration certificate with declared metrological traceability of etalons that is based on requirements of EN ISO/IEC 17025 standard.

Measured value

Relative humidity
Counted values (dew point…)


Measuring range -20 to +60 °C
Accuracy ±0.4 °C
Resolution 0.1 °C

TEMPERATURE SENSOR - external probe Pt1000

Measuring range -90 to +260 °C
Accuracy ±0.2 °C (-50 to +100 °C);
±0.2 % from reading from +100 to +260 °C;
±0.4 % from reading from -90 to -50 °C
Resolution 0.1 °C


Measuring range 0 to 100 % RH
Accuracy ± 1.8 % RH
Resolution 0.1% RH


Measuring range -90 to +60 °C
Accuracy ±1.5 °C at ambient temperature T <25 °C and RH >30 %
Resolution 0.1 °C


Operating temperature -20 to +60 °C
Channels internal temperature and humidity sensor, 1x external temperature probe
Memory 500,000 values in noncyclic logging mode; 350,000 values in cyclic record mode
Recording interval adjustable from 1 s to 24 h
Display and alarm refresh adjustable 1 s, 10 s, 1 min
Recording mode noncyclic - data logging stops after filling the memory
cyclic - after filling memory oldest data is overwritten by new
Real time clock year, leap year, month, day, hour, minute, second
Power battery SONY LiIon 5200mAh
Protection class IP67 electronics; IP30 sensors
Dimensions 61 x 93 x 53 mm, with antenna 120 x 93 x 53 mm
Weight (including batteries) approx. 260 g
Warranty 3 years

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