Programmable Sensor

A complement to any room, the Reliable Controls SMART‑Sensor™ Electronic Paper Display (EPD) delivers a modern networked-sensor solution that allows you to connect with up to 10 configurable parameters related to your space.

Purchase Products

Product features

Aesthetic Design

  • Slim profile with standard SS3 Thin Backplate.
  • Installs into standard electrical box.

Multiple Screen Styles

  • Home screen displays default space conditions.
  • List screen displays all programmed objects.
  • Accessibility screen displays all values and icons in large format.

Easy Programming

  • 10 programmable objects, such as inputs, outputs, and values.
  • Program object values for user adjustment or as display only.
  • Configure objects to display on the home screen.
  • Icons for display: On, off, auto, manual, cool, heat, occupancy, fan, and fan speed.
  • Configure up to seven objects to display simultaneously.

Connection and Addressing

  • Use buttons to enter a unique address on the SMART-Net network.
  • Valid addresses are 1–16.
  • Accepts wires 14–26 AWG.
  • Four-wire connection.

Onboard Temperature Sensor

  • Dedicated 10 kΩ thermistor.

Built-In Configuration Tools

  • Use the SMART-Sensor EPD as an MSet Tool, Flow Tool, or Diagnostics Tool.

Language Library

  • The SMART-Sensor EPD hosts an onboard language library that contains over 90 common industry words and phrases in seven languages. Users can select from the following:  
  • English.
  • French.
  • Spanish.
  • Portuguese.
  • German.
  • Italian.
  • Simplified Chinese.

Optional Front Light

  • EPD screen glows faintly in low light or night conditions while in use, then turns off after 10 seconds of inactivity.

Order Options

  • CO2 sensor.
  • Humidity sensor.
  • Two inputs and two outputs.
  • Occupancy sensor.
  • VOC sensor. Must be ordered with humidity sensor option.
  • Jack option. Adds micro-USB connector and required network terminations to allow local access to the host controller using an X‑Port‑2 Converter with additional custom cables. Cannot be ordered on devices with both an occupancy sensor and a setpoint slider.


  • 5 years.
RoHS 3 Certified

Technical specifications

Supply Voltages from Controller

  • Base model consumes 15 mA at 5 VDC.
  • -CO2 option adds 10 mA.
  • -FL option adds 4 mA.
  • -IO option adds 10 mA.
  • -OC option adds 0.2 mA.
  • -V option adds 20 mA.

Temperature Specifications

  • 12-bit A/D converter.
  • User calibrated to ±0.1°C (0.18°F) accuracy.
  • Onboard thermistor: 0°C to 50°C (32°F to 122°F).
  • Thermistor input: –40°C to 120°C (–40°F to 250°F).


  • 200 x 200 pixels.
  • 23 x 23 mm (15/16” x 15/16”).
  • Black and white.

Language Support

  • Supports seven languages.

CO2 Sensor (-CO2 Option)

  • Automatic background calibration period of 8 days.
  • Single-beam nondispersive infrared sensor.
  • 0–3,276 ppm range.
  • Accuracy ±40 ppm.
  • Nonlinearity <1% of full scale.

Front Light (-FL Option)

  • White LED front light.

Humidity Sensor (-H Option)

  • 0.1% display resolution.
  • 0%–100% range.
  • Accuracy ±2.4% maximum from 0%–90%.

Inputs and Outputs (-IO Option)

  • Two thermistor or dry-contact inputs on devices with the ‑IO option. Only one input is available on models with the -V option.
  • Supports 10K type III thermistor only (0°C/32°F=29.49 kΩ).
  • Two solid-state relay outputs that switch 24 VAC/VDC at 500 mA maximum.

Occupancy Sensor (-OC Option)

  • Passive infrared radiation sensor.
  • 64 detection zones.
  • 94° horizontal range/82° vertical range.
  • 5 m (16.4 ft) maximum detection distance.

VOC Sensor (-V Option)

  • Automatic background calibration.
  • Heated metal oxide sensor.
  • 0-32,767 ppb range.
  • Indoor air quality applications.
  • Accuracy:
    • Typically 25% of measured value.
    • Maximum 50% of measured value.
  • Resolution:
    • 1 ppb (0 to 2,008 ppb).
    • 6 ppb (2,008–11,110 ppb).
    • 32 ppb (11,111–32,767 ppb).

Micro-USB Connector (-J Option)

  • Micro-USB connector and required network terminations to allow local access to the host controller using an X‑Port‑2 Converter with additional custom cables. Provides two-pin connections to the host controller's MS/TP network.
  • Cannot be ordered with devices that combine the ‑OC and ‑S options.

Wiring Terminals

  • 14–26 AWG (2.08–0.13 mm2).
  • Stranded or solid core.
  • Copper conductors only.
  • Low capacitance <82 pF/m (25 pF/f).


  • Base model: 7 cm W x 12 cm H x 1.9 cm D
    (2 3/4" W x 4 3/4" H x 3/4" D).
  • Base model with CO2 sensor: 7 cm W x 12 cm H x 2.5 cm D (2 3/4" W x 4 3/4" H x 1" D).


  • 0.086 kg (0.19 lb).

Ambient Limits

  • Operating: 0°C to 50°C (32°F to 122°F).
  • Shipping: –25°C to 60°C (–13°F to 140°F).
  • Humidity: 10%–90% RH noncondensing.


  • CE.
  • FCC CFR 47 Part 15 Class B.
  • ICES-3 (B).
  • UL 916 Listed.
  • WEEE.


Network wiring

MSTP connection for SMART–Sensor with micro–USB connector

Screen Captures


SS3 Deep Backplate  Backplate Extender
The SS3 Deep Backplate is an accessory for SMART-Sensor™ and SPACE-Sensor™ Temperature devices that facilitates surface mounting without the need to cut an opening in the wall. The SS3 Deep Backplate is ideal for gas-sensing models and for installations on concrete or other solid surfaces. Designed to fit and cover single-device electrical boxes.