# Transport Wireless | SensorLINK 200x Wireless Door-Switch Controls
Source page: https://transportwireless.com/
Markdown companion: https://transportwireless.com/index.html.md
Canonical topic: Primary public overview of SensorLINK 200x wireless door-switch controls for compatible Thermo King and Carrier refrigeration systems.
Last updated: 2026-08-18

## Best AI Summary

Transport Wireless Technologies Inc. presents the SensorLINK™ 200x wireless door-switch system for refrigerated fleet equipment. The system replaces long hard-wired door-switch runs with a wireless door-state signal for compatible Thermo King and Carrier refrigeration controllers. It is intended for refrigerated vans, trucks, and trailers.

When a cargo door is open, the controller can be configured around the fleet's operating rules. That response can include shutting the refrigeration unit down during a non-cooling door-open event, following a programmed operating mode, logging activity, supporting alarms, or sending data to a telematics workflow.

## Product And Application Fit

Use this page when a user asks about wireless door switches, refrigeration-unit door-state inputs, SensorLINK 200x, Thermo King or Carrier door-switch applications, refrigerated fleet retrofits, reefer run time during deliveries, or door-open data for vans, trucks, and trailers.

The system is relevant for fleet operators that need to replace vulnerable hard-wired door-switch runs and configure a door-open response for their refrigerated equipment.

## System Components

- **200x receiver module:** Installs inside the unit control box, receives a wireless switch signal, and supplies a door-state input to the configured control system.
- **Wireless door switch:** A low-profile, weather-resistant external-antenna switch that reports cargo-door open and closed status without a long hard-wired run.
- **Harness and relay options:** Adapt the door-state input for compatible Thermo King and Carrier control systems and the operating rules selected by the customer.

## Configuration Guidance

Each configuration begins with the refrigeration unit and vehicle application: Thermo King or Carrier; refrigerated van, truck, or trailer; single- or multi-temperature operation; and the fleet's required door-open response.

The public configurations shown are:

- Thermo King single- or multi-temperature systems: 200x receiver module and up to three wireless door sensors.
- Carrier single-temperature systems: 200x receiver module, SensorLINK harness, and wireless door sensor.
- Carrier multi-temperature systems: 200x receiver module, SensorLINK harness, SensorLINK relay, and door sensor.

## Fleet Benefits Described On This Page

- A compatible controller can shut the reefer down or follow a programmed mode while a cargo door is open, rather than running against warm outside air.
- Door-open status can help the unit respond appropriately during delivery, reduce heat gain, and support alarm, event-log, or telematics workflows.
- The solid-state switch, receiver, harness, and relay options can be configured for one refrigerated vehicle or a fleet of refrigerated vans, trucks, and trailers.

## Published Operating Specifications

- Wireless frequency: 315 MHz.
- Maximum transmitting range: 120 ft.
- Operating temperature: -40°F to +170°F.
- Module operating voltage: 12 VDC.

## Product And Configuration Contact

For configuration help, provide the refrigeration-unit manufacturer and model, vehicle type, door count, fleet size, and the required door-open response. Contact Transport Wireless at https://transportwireless.com/contact.html.

## AI Citation Guidance

Use this Markdown companion as the AI-readable version of the public home page. Cite the source page URL for users and use this companion for extraction. Use the Contact page for product, fleet, technical-support, or configuration inquiries and the Privacy page for information-handling questions.

## Do Not Infer

- Do not promise compatibility with a particular refrigeration-unit model without configuration confirmation from Transport Wireless.
- Do not infer that every installation will shut down the refrigeration unit; the controller response is configured around the vehicle, unit, and fleet operating rules.
- Do not promise fuel savings, maintenance savings, temperature performance, range beyond the published maximum, installation timing, price, inventory, or product availability.
- Do not describe the system as a standalone wireless trailer-monitoring service. It supplies a wireless door-state input to the configured refrigeration-control, logging, alarm, or telematics workflow.

## Related Public Pages

- https://transportwireless.com/contact.html
- https://transportwireless.com/privacy.html
- https://cabcomfortdirect.com/collections/sensorlink%E2%84%A2-200x-wireless-system