Spectroscopy Detectors · Mid-infrared single-point detectors
DPbS Series
DPbS Room-Temperature PbS Detectors
Room-temperature lead-sulfide detector modules for near- and mid-infrared scanning measurements, with integrated gain selection and voltage output.
Specifications
| Models | DPbS2900 / DPbS3200 |
|---|---|
| Active area | 4 × 5 mm / 6 × 6 mm |
| Spectral range | 0.8–2.9 µm / 0.8–3.2 µm |
| Gain selection | ×1 / ×10 / ×100 |
| Recommended modulation frequency | 400 Hz |
| Signal output | Voltage |
Complete source specification
Model-by-model comparison
The full manufacturer-published comparison is transcribed below so model differences remain visible rather than being reduced to a single range.
Two responsivity/detectivity exponents are poorly encoded in the manufacturer HTML and are therefore marked for confirmation rather than silently corrected.
| Parameter | DPbS2900 | DPbS3200 |
|---|---|---|
| Effective area | 4 × 5 mm | 6 × 6 mm |
| Spectral range | 0.8–2.9 µm | 0.8–3.2 µm |
| Peak wavelength | ≈ 2.2 µm | ≈ 2.1 µm |
| Voltage responsivity Su | ≈ 3 × 10⁴ V/W | ≈ 300 V/W |
| Resistance Rd | 0.2–2 MΩ | 0.1–0.3 MΩ |
| D* | Confirm source exponent | Confirm source exponent |
| Time constant | ≤ 200 µs | ≤ 400 µs |
| Gain | ×1 / ×10 / ×100 | ×1 / ×10 / ×100 |
| Input offset voltage | < ±1 µV | < ±1 µV |
| Preamplifier input drift | ±1 µV | ±1 µV |
| Frequency response | 100–1000 Hz (400 Hz recommended) | 100–1000 Hz (400 Hz recommended) |
| Signal output | Voltage | Voltage |
| Output polarity | P | P |
Design and integration details
- Room-temperature photoconductive PbS detectors with an integrated preamplifier.
- Voltage output and selectable ×1, ×10 and ×100 gain.
- Intended for lock-in detection over the 0.8–3.2 µm region.
Application and connection notes
- Use a lock-in amplifier; select voltage-input mode when pairing with DCS103 or DCS300PA.
- The source recommends 400 Hz modulation within the 100–1000 Hz response range.
Values are transcribed from the archived product table and diagrams. Confirm the final detector, electronics and spectrograph interface for your configuration.
Archived manufacturer product page
