# Low Voltage / Dry Contact Sensor (ELV2)

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##### Model: ELV2

<p class="callout warning">Requires the <span style="text-decoration: underline;"><span style="color: #3366ff; text-decoration: underline;">[**eGauge Sensor Hub**](https://kb.egauge.net/books/egauge-hardware-product-pages/page/sensor-hub-%28esh044%29 "eGauge Sensor Hub")</span></span> and eGauge model EG4xxx (Pro or Core), not compatible with older model units.</p>

<p class="callout warning">Analog sensors require ≤ 50Ω output.</p>

<p class="callout danger">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](https://kb.egauge.net/books/egauge-installation/page/rj-11-wiring-between-sensor-hub-and-sensors)** 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.</p>

The eGauge 2V Analog Input is used in conjunction with the [Sensor Hub](https://kb.egauge.net/books/sensors/page/sensor-hub-%28esh044%29) and an EG4xxx model meter (Core or Pro) which allows EG4xxx meters to read 0 -- 2V low-impedance analog values or states from standard 2-wire dry contacts such as relays.

[See our Sensors product introduction video here](https://www.youtube.com/watch?v=6D82guIQP50&feature=youtu.be).

<table border="0" class="align-center" id="bkmrk-side-view-of-eps-%C2%A0-%C2%A0" style="height: 365px; width: 107.531%; border-collapse: collapse; border-style: hidden;"><tbody><tr><td style="width: 34.3209%;">[![2v-sensor-1000x941-transparent.png](https://kb.egauge.net/uploads/images/gallery/2020-02/scaled-1680-/2v-sensor-1000x941-transparent.png)](https://kb.egauge.net/uploads/images/gallery/2020-02/2v-sensor-1000x941-transparent.png)</td><td style="width: 33.3952%;">[![pulse-topdown.png](https://kb.egauge.net/uploads/images/gallery/2020-02/scaled-1680-/pulse-topdown.png)](https://kb.egauge.net/uploads/images/gallery/2020-02/pulse-topdown.png)</td><td style="width: 32.2839%;">[![sensor-rj11.png](https://kb.egauge.net/uploads/images/gallery/2020-02/scaled-1680-/sensor-rj11.png)](https://kb.egauge.net/uploads/images/gallery/2020-02/sensor-rj11.png)</td></tr><tr><td style="width: 34.3209%;">*Side view of ELV2*</td><td style="width: 33.3952%;">*Front view of ELV2 with connections*</td><td style="width: 32.2839%;">*Back-side of ELV2 with RJ-11 port and CTid locator LED*</td></tr></tbody></table>

## Specifications

#### [Full specs (data-sheet PDF)](https://www.egauge.net/media/support/docs/WEB-ELV2-analog-sensor-sheet.pdf)

[CAD file (STEP format)](https://www.egauge.net/media/support/docs/ELV2.STEP)

- CTid Enabled (w/ auto-configure and locator LED)
- Compatible with  
    
    - 2-wire dry contact or relay
    - 0 to 2 volt analog output sensors with ≤ 50Ω impedance
- 4.7 kΩ pull-up resistor between Signal and 2V
- Signal pin: open- 2V; closed- 0V
- -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  
    Commercial use
- US Patent # 10560763
- 2-year limited warranty

## Hardware included

<div id="bkmrk-"></div>- 1x eGauge Low Voltage Sensor
- 1x 3-pin input plug
- 1x 7’ RJ-11 cable for connection to Sensor Hub

## Assembly/installation information

1. 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*.
2. 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).
3. If terminating own cables, both RJ11 and RJ45 cables should be straight-through cables, with the same color order on both ends.

1. [Install the sensors and Sensor Hub](https://kb.egauge.net/books/sensors/page/sensor-hub-%28esh044%29).
2. Connect the ELV2 to the 0-2V sensor output using the signal and ground ports on the ELV2. The 5V pin is unused.
3. [Configure the sensors](https://kb.egauge.net/books/sensors/page/configuring-ctid-enabled-sensors).


## Documents

- [Spec Sheet](https://kb.egauge.net/attachments/16)
- [FCC Declaration](https://kb.egauge.net/attachments/27)
- [CAD file (STEP format)](https://www.egauge.net/media/support/docs/ELV2.STEP)

## Related Information

- [Sensor Hub Product Page](https://kb.egauge.net/books/egauge-hardware-product-pages/page/sensor-hub-%28esh044%29)
- [Configuring CTid Sensors](https://kb.egauge.net/books/egauge-meter-configuration/page/configuring-ctid-enabled-sensors)

### Diagrams

#### 2-Wire dry contact or relay

[![elv2-dry.png](https://kb.egauge.net/uploads/images/gallery/2020-02/scaled-1680-/elv2-dry.png)](https://kb.egauge.net/uploads/images/gallery/2020-02/elv2-dry.png)

#### 2 volt analog sensor

[![elv2-analog2v.png](https://kb.egauge.net/uploads/images/gallery/2020-02/scaled-1680-/elv2-analog2v.png)](https://kb.egauge.net/uploads/images/gallery/2020-02/elv2-analog2v.png)

#### Typical Setup Overview

[![image-1582232841726.png](https://kb.egauge.net/uploads/images/gallery/2020-02/scaled-1680-/image-1582232841726.png)](https://kb.egauge.net/uploads/images/gallery/2020-02/image-1582232841726.png)