FAC0420-11
Wireless 4–20 mA Current Sensor
The Wireless 4–20 mA Current Sensor from Fidar Electronics reads the standard 4–20 mA output of any industrial transmitter and maps it back to engineering units. It links over a LoRa radio with no cabling at all.
Standard 4–20 mA input
Works with any industrial 4–20 mA transmitter
Broken-wire detection below 4 mA
LoRa radio link up to 1 km line of sight
AES-128 encrypted payloads
Pairs with the FWL1600-01 LoRa card
No cabling; pairing takes seconds
Low-battery warning per node
The 4–20 mA loop is the common language of industrial transmitters: pressure, level, flow, temperature, humidity, pH and dozens of other quantities all travel on it. This sensor reads any 4–20 mA transmitter into the Fidar monitoring chain, with the mA-to-engineering-unit mapping configured in software. The standard's real advantage is that true zero sits at 4 mA: anything below it means a broken wire or a dead transmitter, so the fault announces itself instead of failing silently.
Key features
Standard 4–20 mA input
Works with any industrial 4–20 mA transmitter
Broken-wire detection below 4 mA
LoRa radio link up to 1 km line of sight
AES-128 encrypted payloads
Pairs with the FWL1600-01 LoRa card
No cabling; pairing takes seconds
Low-battery warning per node
Connectivity
LoRa link up to 1 km with AES-128 encryption
Quick pairing with the FWL1600-01 receiver card
Sensor-fault and low-battery warnings before the cell dies
Where it is used
Reading pressure, level, flow and temperature transmitters
Tank and pipeline monitoring in oil, gas and petrochemicals
Bringing environmental analysers into a monitoring system
Pumping stations and water/wastewater treatment plants
Retrofitting legacy instruments into a modern monitoring stack
Air-quality and emission-measurement systems
Installation
Run the loop in shielded twisted pair and earth the shield at one end only, so you do not create a ground loop.
