C1D1 Wireless Nodes



Sentinel Datasheet

Data Sheet



Powers sensor and radio for years with an internal battery
Class 1 Division 1 Intrinsically safe system
Optional Class 1 Division 1 solar module with integrated charger, battery panel, and mounting bracket
Costs less than 60ft of installed conduit
Rugged design for demanding outdoor environments
Up to 1/2 mile range
Sensor independent
1/2” NPT conduit interface
Automatically configures as a star or mesh network
Simple to install and Maintain


Operating Temp: -40ºC to 60ºC

Humidity: 0% – 100% condensing

Power: 3 X D Lithium battery pack. Field replaceable. Class 1 Division 1 certified when used with SignalFire system. In situ replacement does not require a work ticket. Optional Class1 Division 1 solar/battery module.

Sensor Power: Powers both the radio system and the sensor/transmitter. User configurable 1-5 Vdc or 4-20 mA mode.

4-20 mA mode: 18 Vdc @ 4 mA, 13 Vdc at 20 mA.

Barriers and external power not required.

Battery Life: 1–10 years depending on the type of sensor and reporting frequency.

Data Interface: Wireless – available as Modbus registers at Gateway.

Data Update Rates: User-selectable. 5 seconds to 1 hour, typical.

Supported Sensor Interfaces: HART, 4-20 mA current loop, 1-5 Volt, Digital input (state, counter, totals, frequency), RS-485/Modbus, Thermocouple and RTD temperature sensors.

Radio Power: 40 mW

Receive Sensitivity: -109 dB

Radio Frequency: 902–928 MHz, FHSS, license-free ISM. Band Compliant with FCC Part 15.

Range:Up to 1/2 mile

Networks: Up to 65,520 separate networks.

Intrinsically Safe: Class 1 Division 1, Temp Code T3, Groups C&D. Conforms to UL Std. 913, Certified to Can/CSA Std C22.2 No. 157

Internal Diagnostics: Battery voltage, signal strength, error conditions.

Potentiometer Input: Variable resistance


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