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Trac10251 Dry Contact LoRaWAN Sensor

TRAC10251 DRY CONTACT LORAWAN SENSOR is a ClassA external dry contact device based on LoRaWAN open protocol of Trac10251 Dry Contact LoRaWAN Sensor. It can externally connect various switches, buttons, relays and reed switch output. It can detect the closing or disconnecting signal of dry contact and is compatible with LoRaWAN protocol.

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SKU:Trac101251Categories: , ,


Input Power 2 x 3.6V ER14505 AA lithium batteries


Standby Current 22uA
Wakeup Current 6.3mA/ 3.3V
Transmitting Current (max) 120mA/ 3.3V
Receiving Current (max) 11mA/ 3.3V
Battery Measurement Accuracy ± 0.1V
Low Voltage Threshold 3.2V

External Wire Characteristics 

Wire Material UL2547 28AWG
Wire Temperature (Max) 80°C
Wire Outer Diameter (Max) 2mm
Wire Length 1000mm (±5mm)
Wire Flame Resistance Rating VW-1


Frequency Range 863MHz-928MHz    470MHz-510MHz
TX Power
US915      20dbm;
AS923      16dbm;
AU915                 20dbm; CN470                 19.15dbm; EU868                 16dbm;
KR920      14dbm;
IN865        20dbm;
Receiving Sensitivity
-136 dBm
(LoRa, Spreading Factor=12, Bit Rate = 293bps)
-121 dBm
(FSK, Frequency deviation=5kHz, Bit Rate=1.2kbps)
Antenna Type Build-in antenna

Communication Distance

10 km

(Visible linear obstacle-free transmission distance, actual transmission distance depending on the environment.)

Data Transfer Rate 0.3kbps ~ 50kbps
Modulation LoRa / FSK (Note: choose one of them)

Supportable LoRaWAN Frequency

EU863-870, US902-928, AU915-928, KR920-923,

AS923, CN470-510

(Note: The frequency band is optional and needs to be configured before shipment.)


Dimension L: 112 mm x W: 88.19 mm x H: 32 mm
Weight 141g
Environment Humidity Range <90 %RH (No condensation)
Operating Temperature -20°C to 55 °C
Storage Temperature -40°C to 85 °C

Main Characteristic

  • Adopt SX1276 wireless communication module
  • Compatible with LoRaWANTM Class A
  • Improved interference immunity
  • The base is attached with a magnet that can be attached to a ferromagnetic material object
  • Frequency hopping spread spectrum (FHSS)
  • Configuration parameters can be configured through third-party software platforms, data can be read and alarms can be set via SMS text and email (optional)
  • Applicable to the third-party platforms: Actility/ThingPark, TTN, MyDevices/Cayenne
  • Low power consumption and long battery life