HTS Multichannel Series
HTS Multichannel Series
The HTS Multichannel Series provide two or four independent sensor elements for multichannel gas concentration measurements in a small TO-39 metal housing. Typically, one to three channels are equipped with gas specific filters with different center wavelengths (CWL). The other channel serves as a reference and is equipped with a filter with CWL at which no absorption occurs.
In general, a broad band filter will result in a high signal output, whereas a narrow band filter with low Half Power Bandwidth (HPBW) will allow high measurement accuracy.
Features and Benefits
- Small leadless SMD package
- Integrated ASIC with analog output
- Integrated linear temperature reference
- Large number of optical filter options
- Large operating range -20°C to 120°C
- Ideal for gas concentration measurements
Specifications
| HTS Q21 | HTS E21 | HTS E31 | Unit | |
|---|---|---|---|---|
| Element size | 1.2² | 1.2² | 2.1² | mm² |
| Voltage response | 63 | 63 | 115 | V mm² / W |
| Sensitivity | 44 | 44 | 26 | V / W |
| Resistance RTP | 84 | 84 | 84 | kOhm |
| TC of resistance RTP | 0.02 | 0.02 | 0.02 | % / K |
| Noise | 37 | 37 | 38 | nV / Hz½ |
| Detectivity | 1.4e8 | 1.4e8 | 1.5e8 | cm Hz½ / W |
| Time constant | 10 | 10 | 18 | ms |
| Thermistor reference | 100 | 100 | 100 | kOhm |
| Temp. coeff. of thermistor | 3940 | 3940 | 3940 | K |
| Operating temperature | -20 .. 120 | -20 .. 120 | -20 .. 120 | °C |
| Storage temperature | -40 .. 120 | -40 .. 120 | -40 .. 120 | °C |
Filter Options
Gas Concentration Measurements
| Gas | CWL in nm | HPBW in nm | Filter |
|---|---|---|---|
| CH₄ | 3300 | 160 | F3.3/160 |
| HC | 3375 | 190 | F3.375/190 |
| CO₂ | 4260 | 180 | F4.26/180 |
| CO₂ | 4300 | 110 | F4.3/110 |
| CO₂ | 4430 | 60 | F4.43/60 |
| CO | 4640 | 180 | F4.64/180 |
| CO | 4640 | 90 | F4.64/90 |
| N₂O | 4530 | 85 | F4.53/85 |
| NO | 5300 | 180 | F5.3/180 |
| - (ref.) | 3910 | 90 | F3.91/90 |
