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ETI 133-475 | Black Ball Probe | Type K, 50 mm Copper Sphere
The ETI 133-475 black ball probe measures the effective ambient temperature of an environment using black body principles. A type K thermocouple sits inside a copper sphere of about 50 mm diameter with a matt black exterior, so the reading reflects both air temperature and radiant heat rather than air alone.
Key features
- Type K thermocouple sensor
- Copper sphere, approximately 50 mm diameter
- Matt black outer coating to maximise radiant heat absorption
- Bright copper interior to minimise internal radiation losses
- For oven monitoring, environmental and process measurement
- Specifications
| Part Number | 133-475 |
| Brand | ETI |
| Sensor Type | Type K thermocouple |
| Sphere | Copper, approx. 50 mm diameter |
| Exterior | Matt black coating |
| Interior | Bright copper |
| Measures | Combined air temperature and radiant heat |
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