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SKU:
ZZ3F05200
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40-974 Graded Sensor Air Temperature Fit for Thermo King SL TCI SL-100 SL-200
$59.19
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
Air Temperature Sensor for Thermo King SL
This 40-974 graded sensor air temperature component is a service-grade replacement temperature sensor engineered for Thermo King SL TCI, SL-100, and SL-200 refrigeration systems, delivering accurate air temperature readings to maintain cargo integrity. It matches the OEM cross-reference 40-974 and supports the TCI control interface for seamless system integration.
Overview
This 40-974 graded sensor air temperature unit continuously samples return or ambient air temperature and transmits that data to the Thermo King SL controller, enabling precise refrigeration cycles. It is designed for technicians servicing Thermo King SL TCI, SL-100, and SL-200 units, and replaces the original sensor with the same 40-974 reference. The 40-974 graded sensor air temperature construction provides stable output across the operating range, reducing false readings and system errors.
Built For Performance
- Replacement sensor with OEM cross-reference 40-974
- Graded thermistor element for linear temperature response
- Sealed housing protects against humidity and frost
- Direct-fit terminal layout for SL-series harness
- Meets original electrical resistance curve
- Rugged lead wire resists flex fatigue
Fits These Machines
- For Thermo King SL TCI
- For Thermo King SL-100
- For Thermo King SL-200
On-The-Job Use
- Replaces worn or shorted sensors in SL-series reefer units
- Supports accurate temperature logging in sensitive freight hauling
- Used in diagnostic replacement for TCI error code resolution
- Install during annual refrigeration maintenance intervals
Specs At A Glance
| Part Number(s) | 40-974 |
| Sensor Type | Graded air temperature |
| Compatible Systems | Thermo King SL TCI, SL-100, SL-200 |
| Electrical Interface | TCI-compatible |
Good To Know
Q: Can this sensor be used on a Thermo King SL-300? A: This sensor is listed for SL TCI, SL-100, and SL-200 only; the SL-300 may use a different sensor curve, so check your unit's manual or controller part number.
Q: Does this sensor come pre-calibrated? A: Yes, the graded element is factory-calibrated to the Thermo King SL resistance spec, so no field calibration is required after installation.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.