The TPS 434 thermopile detector features an extremely small absorber size and low temperature coefficient of sensitivity, making it suitable for high precision pyrometers and ear thermometers.
The TPS 434 is a thermopile detector housed in a TO‑5 package with an extremely small 0.5 × 0.5 mm absorber, making it suitable for high‑precision pyrometers and ear thermometers. It includes a built‑in 30 kΩ thermistor temperature reference and a standard 5.5 mm long‑pass infrared filter, with an optional G9 (8‑14 µm) filter for precision applications.
Key electrical and environmental specifications are listed, including a DC sensitivity of 35 V/W, noise of 21 nV/√Hz, NEP of 0.6 nW/√Hz, and a temperature range of –40 °C to 100 °C. The detector offers a 55° field of view at 50 % points and a time constant of 20 ms.
| Sensitive area | 0.5 x 0.5 mm² |
|---|---|
| Window size | 2.5 mm diameter |
| DC sensitivity | 35 V/W |
| Resistance | 35 kΩ |
| Noise | 21 nV/√Hz |
| NEP (Noise Equivalent Power) | 0.6 nW/√Hz |
| Detectivity (D*) | 0.84 x 10⁸ cm·√Hz/W |
| Temperature coefficient of sensitivity | 0.02 %/K |
| Temperature coefficient of resistance | 0.02 %/K |
| Time constant | 20 ms |
| Operating temperature | -40 to 100 °C |
| Storage temperature | -40 to 100 °C |
| Thermistor resistance | 30 kΩ |
| Thermistor beta | 3964 K |
| Field of view | 55° at 50% points |
The absorber size is 0.5 × 0.5 mm.
The detector has a DC sensitivity of 35 V/W.
It operates from –40 °C to 100 °C.