# Horizon Fitness CST3 TM119-1US Treadmill RPM Speed Sensor (SS342)

\# Horizon Fitness CST3 TM119-1US Treadmill RPM Speed Sensor (SS342)

The Horizon Fitness CST3 TM119-1US Treadmill RPM Speed Sensor is a replacement treadmill sensor designed to detect the rotating movement of the treadmill drive system. The sensor helps the treadmill monitor belt and motor rotation so the machine can track operating speed. If you are servicing a compatible Horizon Fitness treadmill and need to replace its RPM or speed-sensing component, this part provides a direct match based on the listed model information.

## Product Details and Benefits

This product is a treadmill RPM speed sensor from Horizon Fitness. Its primary function is to sense rotational speed inside the treadmill and provide that information to the machine’s control system. The treadmill uses this input to monitor how the drive system is operating during use.

A faulty, worn, disconnected, or damaged speed sensor can affect how a treadmill reads or controls movement. Replacing the sensor may help restore the correct speed-sensing function when the existing component no longer provides a reliable signal. The sensor is intended for treadmill repair and maintenance rather than general household or industrial use.

The product is identified by the following details:

\- \*\*Brand:\*\* Horizon Fitness  
\- \*\*Product type:\*\* Treadmill RPM speed sensor  
\- \*\*Product category:\*\* Treadmill Sensors  
\- \*\*Model compatibility:\*\* Horizon Fitness CST3 TM119-1US treadmill  
\- \*\*Part number:\*\* SS342  
\- \*\*SKU:\*\* SS342  
\- \*\*Barcode:\*\* SS342  
\- \*\*Listed serial number:\*\* TM119-B04080021

This part suits customers repairing a compatible Horizon Fitness treadmill, maintaining equipment for regular home use, or replacing a sensor during treadmill troubleshooting. Because the sensor provides speed-related feedback, using the correct part number matters when servicing the machine.

## Compatibility and Applications

The Horizon Fitness SS342 RPM speed sensor is listed for the \*\*Horizon Fitness CST3 TM119-1US treadmill\*\*. It is designed for use with this specific treadmill model and its speed-monitoring system. The part serves as the treadmill’s rotational speed-sensing component, helping the equipment detect movement within the drive system.

Use this sensor when the existing treadmill RPM sensor requires replacement. It may also be useful during equipment inspection or repair when the sensor has been identified as the source of a speed-feedback issue. The product page does not provide a list of additional compatible treadmill models, so buyers should not assume that it fits other Horizon Fitness machines without confirming the part number and model details.

## Why Choose This Product

The main reason to choose the SS342 is its specific identification for the Horizon Fitness CST3 TM119-1US treadmill. Matching the sensor to the correct equipment model can make the repair process more straightforward and helps avoid ordering a part with a different application. Its clear part number, \*\*SS342\*\*, also makes it easier to compare with the sensor currently installed in your treadmill.

## Before You Buy

Confirm that your treadmill is a \*\*Horizon Fitness CST3 TM119-1US\*\* and compare the existing part number with \*\*SS342\*\* before ordering. Check the machine’s identification label and, where applicable, verify the listed serial reference \*\*TM119-B04080021\*\*. The product information does not specify dimensions, materials, included hardware, installation instructions, warranty coverage, or package quantity. Ensure those details meet your repair requirements before purchase.

## Details

- **Price:** 29.99 USD
- **Vendor:** Horizon Fitness
- **Type:** Treadmill Sensors
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 29.99 USD | In stock |

## Images

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## Additional Information

- **Condition:** PREOWNED

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> Source: [Cardio Equipment Parts](https://www.cardioequipmentparts.com/products/horizon-fitness-cst3-tm119-1us-treadmill-rpm-speed-sensor-ss342)
> Updated: 2026-08-29