Heat-Timer® Corporation

MSIG Sensors

Multi-Sensor Input Gateway (16 Sensor inputs)


The MSIG gives any Platinum control the capability of accessing a large number of additional inputs. The inputs can be temperature sensors or switch sensors. Each MSIG provides inputs for up to 16 total sensors. Multiple MSIGs can be connected to a single Platinum control.

Connecting the MSIG to the Platinum control and then configuring the inputs through the Internet will give the user the access to those inputs values as well as the alarming capability for those inputs.

Outdoor Reset Modulating Boiler Controls for Hydronic Heating Systems

  • View sensor values locally using the built-in digital display.
  • Can connect to Temperature and Switch Sensors
  • Easy to install. Just connect the Mini-MIG to any Platinum control with remote communication capability
Mini-MIG 926834-00
Three-in One Temperature Sensor 904220-00
Small Standard Brass Tube Sensor (3/8″ x 3/4″) 904250-00

My outdoor sensor reading does not match the actual temperature.
The outdoor sensor measurement may vary based on its location and its sun exposure. In most cases it will never match a weather station that is located several miles away. most current Heat-Timer controls have a Trim feature which allows the sensor reading to be slightly modified just a few degrees to satisfy similar circumstances. If the difference was large, then check the sensor by disconnecting one of its wires from the control. The control should read OPEN. If not, contact technical support.

Why is my temperature sensor reading Open on the control display?

A:Remove the sensor wires from the control and check for continuity across the wires with and meter. If no continuity existed, check or replace the wires. if continuity did exist, then contact technical support.

Why is my temperature sensor reading Short on the control display?

Remove one of the sensor wires from the control. The control display should change and display OPEN. Then check the sensor wiring specifically around spliced areas. If wiring was good, then disconnect the sensor wires from the control and check the sensor wires with an Ohm meter. The readings should match the sensor temperature chart on the control manual. It not, then replace the sensor. If after removing one of the sensor wires the control read SHORT, then contact tech support.

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