KELLER
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| Brand | KELLER |
|---|---|
| Origin | Germany |
| Model | HCW Series |
| Measurement Principle | Two-Color (Ratio) and Single-Wavelength Pyrometry |
| Temperature Range | –30 °C to 3500 °C (model-dependent, segmented calibration) |
| Optical Resolution (Distance-to-Spot Ratio) | Up to 300:1 |
| Spectral Response | 0.8–1.1 µm (short-wave), 1.6 µm, 2.2 µm, or 8–14 µm (depending on model) |
| Output Signals | 4–20 mA, 0–10 V, thermocouple emulation, RS232/RS422/RS485 |
| Environmental Rating | IP65 (standard), optional IP67/IP69K housings |
| Housing Material | Anodized aluminum or AISI 316 stainless steel |
| Compliance | CE, RoHS, EMC Directive 2014/30/EU, IEC 61326-1 (industrial environments) |