4-20mA Sensor (EC420)
Requires the eGauge Sensor Hub and eGauge model EG4xxx (Pro or Core), not compatible with older model units.
Only use straight-through RJ-11 cables to connect powered sensors to the Sensor Hub. Telephone systems generally use "reverse" style RJ-11 cables which are incompatible with the Sensor Hub. See this article for more information on verifying the correct RJ-11 wiring. Every Sensor Hub compatible sensor sold by eGauge Systems comes with a straight-through RJ-11 cable.
The eGauge 4-20mA Sensor is used in conjunction with the Sensor Hub and an EG4xxx model meter (Core or Pro) to read a 4-20mA current loop sensor such as pressure sensors, water level sensors, temperature probes, and other industrial sensors that output a 4-20mA current loop.
|eGauge EC420 4-20mA Sensor|
- CTid Enabled (w/ auto-configure and locator LED)
- Compatible with 4-20mA current loop sensors
- -30 °C to 70 °C
- Humidity range: Up to 80%
- Extruded aluminum Case
- 26 x 26 x 40 (mm), 1.02 x 1.02 x 1.57 (in.)
- 7' RJ-11 cable for Sensor to Sensor Hub
- 47 CFR Part 15, Subpart B – Unintentional Radiators, Class B for Home or
- US Patent # 10560763
- 1x eGauge 4-20mA Sensor
- 1x 3-pin input plug
- 1x 7’ RJ-11 cable for connection to Sensor Hub
- It is not advisable to extend the RJ11 leads from the Sensor to Sensor Hub. It is acceptable to use a longer RJ45 cable from the Sensor Hub to the eGauge.
- If RJ11 cable between Sensor and Sensor Hub must be extended, it is advisable to use twisted pair wires, such as a CAT5 cable with RJ11 plugs (most commonly used for DSL modems).
- If terminating own cables, both RJ11 and RJ45 cables should be straight-through cables, with the same color order on both ends.
Additional Software Configuration
The EC420 will report and record the milliamp value as a decimal number. If desired, the mA value can be converted to a numerical format the eGauge supports using the slope intercept formula of
y = mx + b where
y is the formula register you create, and
x is the register recording the raw EC420 value.
If a 4-20mA sensor is connected to the eGauge measuring a percentage value between 0% and 100%, the slope intercept formula would be
6.25x + -25:
Similarly, a temperature sensor that can read between -50 °C and 200 °C would have a formula of
15.63x + -112.5 and would be configured like this:
This assumes the minimum and maximum values of the sensor range start at 4mA and end at 20mA.