High-Precision Pressure / Liquid Level, Temperature and Electrical Conductivity Sensor for LoRaWAN®

Made by
Decentlab is a certified partner.


The device DL-PR36CTD enables remote monitoring of water level, temperature and electrical conductivity with high precision. Applications are water quality monitoring in open water, fill level of tanks, groundwater quality and level and various other applications. It measures the pressure at the sensor head relative to the pressure at the cable end (device enclosure). When the sensor head is placed under water (or any other liquid), the relative pressure indicates the depth of the sensor head. In water, the relative pressure of 1 bar equals to a depth of approximately 10 m. Also available on request is a variant of the DL-PR36CTD which measures the absolute pressure at the sensor head, i.e., the pressure relative to zero bar (vacuum).
The electrical conductivity measurement is used for monitoring the ion concentration in water (salinity, concentration of pollutants). Thanks to the four-wire technology, the conductivity probe is not affected by polarization effects or dirt.
The device also reports the temperature of the sensor head with high precision. The temperature reading is also used internally for temperature compensation.
Sensor data are transmitted in real-time using LoRaWAN® radio technology. LoRaWAN® enables encrypted radio transmissions over long distances while consuming very little power. The user can obtain sensor data through Decentlab’s data storage and visualization system, or through the user's own infrastructure.

Visit www.decentlab.com for more information about Decentlab's data cloud service.


  • Level / depth and water quality in tanks for liquids
  • Boreholes
  • Groundwater and wells
  • Running or open water level and quality
  • Salinity and chloride monitoring
# End Device
# EU 863-870
# Industrial IoT
# Logistics
# US 902-928



  • Piezoresistive transducer
  • Range: 0 … 1 bar, relative (other ranges on request)
  • Linearity / precision: max. ±0.02% of full scale
  • Total error band: max. ±0.1% of full scale


  • Range: -40 ... +125 °C
  • Accuracy: max. ±0.1 °C


  • Range: 0 … 20 mS/cm (other ranges on request)
  • Accuracy: max. ±2.5% of full-scale

Technical details

  • LoRaWAN™ class A
  • 2 C alkaline batteries
  • 13.5 cm × 8.1 cm × 7 cm (not including sensor / cable)
  • 10 m cable
  • Reference DL-PR36CTD

Datasheet and decoder on www.decentlab.com/support

DL-PR36CTD's Distributors

Decentlab GmbH