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| | Model | SN11 | SN21 | SN51 | SNR1 | |
| | Operating range: | 550 to 1750°C/ 1022 to 3182°F | 250 to 1300°C/ 482 to 2372°F | 200 to 1100°C/ 392 to 2012°F | 700 to 1750°C/ 1292 to 3182°F | |
| | Specified range: | 600 to 1750°C/ 1112 to 3182°F | 300 to 1300°C/ 572 to 2372°F | 250 to 1100°C/ 482 to 2012°F | 750 to 1750°C/ 1382 to 3182°F | |
| | Spectral response: | 1pm | 1.6pm | 5pm | 1pm ratio | |
| | Field of view (95% energy): | 100:1 | 100:1 | 50:1 | 100:1 | |
| | Focusing: | Fixed, user configurable focus: 250mm/9.8in, 500mm/19.7in, 1000mm/39.4in and infinity | |
| | Output: | 0 or 4 to 20mA user selectable (isolated 50V) | |
| | Response time (0 to 90%): | 10ms | 10ms | 50ms | 10ms | |
| | Emissivity: | | 0.10 to 1.00 | - | |
| | Non greyness: | 0.80 to 1.25 | |
| | Resolution (mid range): | | |
| | Stability: | 0.2°/° | 0.2°/° | 0.02%K/K | 0.05K/K | |
| | Accuracy (absolute): | 0.3%K | 2K | 0.35%K | 0.6%K | |
| | Time functions: | Peak picker, track and hold, and averager | |
| | Alarm outputs: | Process high, process low, internal temperature, emissivity/NG signal lost, insufficient signal (SNR1 only); rated to 50V d.c., 0.1A non-inductive, NO or NC - software selectable | |
| | Optional sighting: | Laser defining optical axis; class 2, 1mW, 650nm, 120s ON duration, automatic switch-off | |
| | Ambient limits: | 5 to 60°C/41 to 140°F specified; | 0 to 70°C/32 to 158°F operating | |
| | EMC: | EN 61326:1999 (immunity and emission) | |
| | Sealing: | IP65/NEMA 4X | |
| | Vibration: | 3g (10 to 300Hz) | |
| | Power supply: | 18 to 30V d.c. (24V d.c. nominal) | |
| | Optional accessories: | | |
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