Product Overview
The CWF series NTC Thermistor Probes from Cantherm are precision sensors designed for accurate temperature measurement and control across a wide range of applications. These probes feature PVC leads, insulated with heat-conductive, water-resistant materials, and are potted into various probe bodies for diverse installation needs. They offer high reliability, fast response times, long-term stability, and excellent tolerance. Available in five basic enclosure styles, including ethoxyline dipped, metal-housed, plastic-bodied, sheet metal attachment fixtures, and custom probes, the CWF series is suitable for HVAC, automotive electronics, water heaters, household appliances, and industrial temperature control.
Product Attributes
- Brand: CWF (Cantherm)
- Division of: Microtherm
- Origin: Canada
- Lead Material: PVC
- Insulation Material: Heat conductive, water resistant
Technical Specifications
| Part No. | Rated Resistance R25 () | B Value (25/50C) (K) | Dissi. Coef. (mW/C) | Thermal Time Constant (S) | Operating Temp. Range (C) | Allowable Tolerance (%) |
|---|---|---|---|---|---|---|
| CWF[][][]3100 | 100 | 3100 | 2.2 | 70 | -55 to 125 | 1, 2, 3, 5 |
| CWF[][][]3270 | 270 | 3270 | ||||
| CWF[][][]3380 | 1000 | 3380 | ||||
| CWF[][][]3470 | 2700 | 3470 | ||||
| CWF[][][]3600 | 5000 | 3600 | ||||
| CWF[][][]3950 | 10000 | 3950 | ||||
| CWF[][][]4000 | 20000 | 4000 | ||||
| CWF[][][]4050 | 50000 | 4050 | ||||
| CWF[][][]4150 | 100000 | 4150 | ||||
| CWF[][][]4300 | 200000 | 4300 | ||||
| CWF[][][]4500 | 500000 | 4500 |
Package Options:
- 1- Dipped ethoxyline resin: Moisture resistant, good insulation, high reliability, small time constant, quick responses.
- 2- Aluminum, copper, or stainless steel housing: High resistance to thermal shock, moisture resistant, strong and secure structure, high dissipation coefficient.
- 3- Plastic body: Good dimensional tolerances, good heat resistance and moisture protection, high voltage resistance.
- 4- Sheet metal attachment fixtures: Wide variety of fixtures, suitable for most applications.
- 5- Special probes: Small time constant, fast response, flexible and secure.
Dimensions (mm):
Standard Probes:
| Code | A (Max) | B (Max) | C (Max) | D (Max) | L1 (Max) | L2 (Customer Specified) |
|---|---|---|---|---|---|---|
| 1A | 4 | 5 | 6 | 7 | 16 | Customer Specified |
| 2A | 4 | 5 | 5 | 5 | 16 | Customer Specified |
| 3AA | 4 | 5 | 5 | 5 | 20 | Customer Specified |
| 3B | 4 | 8 | 8 | - | - | Customer Specified |
Customer Specified Dimensions:
| Code | D (0.2 mm) | L1 (0.2 mm) | L2 (Customer Specified) |
|---|---|---|---|
| 3AA | 5 | 20 | Customer Specified |
| 3B | 8 | 35 | Customer Specified |
| 3C | 8 | 50 | Customer Specified |
| 3D | - | - | Customer Specified |
General Applications:
- Heating, ventilation & air conditioning
- Temperature regulation and measurement
- Automotive electronics
- Water heaters
- Household appliances (refrigerators, water coolers, dishwashers)
- Fan control
- Industrial temperature controllers
- Electronic thermometers
General Characteristics:
- Wide variety of installation fixtures and probes.
- Small size and fast response (temperature coefficient of resistance can reach - (2~5%/C)).
- Long-term stability and reliability (yearly drift of 1%).
- Excellent tolerance and interchangeability (accuracy of R and B value can be 1%).
- Double layer packaging provides excellent insulation and high strength and impact resistance.
- Dissipation constant type 1 package 2.0mW/C, type 2 package 4.0mW/C.
- Time constant of 15S to 70S.
2411220418_Cantherm-CWF4B683F3950_C17637836.pdf
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