NB-IoT MQTT water level monitoring data logger




ThingsLog MQTT NB-IoT remote water level monitoring tank level monitoring data logger includes :

  • NB-IoT ultra low power data logger
  • Level Sensor and barometric cable suitable for monitoring of water tanks and reservoirs

The logger is suitable for remote montioring and instant notifications for:

  • Water tanks
  • Water dwells
  • Borehole Water Levels
  • Sewage and storm water level monitoring and blockage detection

  • Ponds and reservoirs

NB-IoT MQTT remote water level monitoring data logger features

  • Fluid: non aggressive fluids (water)
  • Level of measurement: up to 200m possible. More than 100m on special request.
  • Working temperature: 0 ÷ 70 °C
  • Low/High level instant alarms
  • Accuracy: 0.5% for 100% of FSO
  • Electrical connection: ventilated cable
  • Probe diameter: 27 (30) mm
  • Probe material: stainless steel 304/316 L
  • Built-in stainless steel membrane 316 SS
  • IP68 level of protection
  • Data transmission over NB-IoT
  • Frequency Bands: B1/B3/B8/ B5/B20/B28
  • Optional support for US/Canada
  • Configurable metering and transmission periods
  • Reconfiguration over the AIR
  • Mobile app
  • 10 years battery life (12000 transmissions)
  • 19 uA consumption in sleeping mode
  • Replaceable battery

MQTT data format

Data is publish to the following mqtt topics:

  • Signal strength rssi/ber: <root topic>/<device number>/signal
  • Battery in mV: <root topic>/<device number>/battery
  • ON/OFF and high/low level alarms <root topic>/<device number>/alarms
  • Sensor readings <root topic>/<device number>/readings/{I}, where I is the sensor index for which pubishing is enabled.

Root topic is configurable, device number is 8 digits.

Level monitoring data readings (sensor index 3 and 4) are published as int 16 values.


  • Why is important to measure level and pressure – link
  • Official product page – link

Additional information

Weight 1 kg
Dimensions 40 × 40 × 10 cm
Level depth

1m, 4m, 8m, 20m, 50m, 100m

Excessive cable length


Power supply

Low power with lithium battery pack, Solar, 12VDC, 24VDC


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