| Ordering Number | Description | |
| ETR-3-01 | 0-1400°F, type J, TC, latching relay, 120 VAC | |
| ETR-3-02 | 0-2300°F, type K, TC, latching relay, 120 VAC | |
| ETR-3-03 | 0-600 F, type J, TC, latching relay, 120 VAC | |
| ETR-3-04 | -330 - 1100°F, RTD, 120 VAC | |
| ETR-3-05 | 0-750°C, type J, TC, latching relay, 120 VAC | |
| ETR-3-06 | 0-1400°F, type J, TC, latching relay, 24 VAC | |
| ETR-3-09 | 0-850°F, RTD, latching relay, 120 VAC |
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