Specifications H2S Sensor
The H2S sensor works according to the principle of non-dispersive UV absorption (NDUV). The measuring wavelength used is in the lower nanometer range, which enables inter-ference-free measurements with water vapour and hydrocarbons. This makes the sensor ideal for use in biogas measurements, as accompanying gases such as NH3, CO2, CH4 and H2O do not affect the accuracy of the measurements.General features
| Measurement technology: | Innovative NDUV Sensor (non-dispersive ultraviolet sensor) Dual beam |
| Detectable gases: | H2S SO2 |
| Number of simultaneously detectable gases: | max. 2 |
| Measurement ranges: | See below |
| Flow rate range: | 6 ~ 300 ltr/h – For higher flow rates the sensor can be operated in bypass |
| Max. gas inlet pressure: | 300 mbar |
| Pressure loss (without additional optional sensors): | 10 @ 100 / 35 @ 200 / 70 @ 300 (mbar @ ltr/h) |
| Temperature compensation: | Yes |
| Data acquisition software: | Yes |
| Lifetime of UV radiation source: | > 8 000 h |
| Measurement cuvette: | Stainless steel with silicone coating inside |
| Cuvette sealing: | Viton O-ring |
| Casing: | High-quality table-top casing, aluminium |
| Dimensions (W x H x L): | 464 x 189 x 305 mm |
| Weight: | approx. 6.5+ kg |
| Gas connections: | PVDF screw-type tube connection for tube Øi 4mm, Øo 6 mm |
Measuring response
| Linearity error: | < ± 1% F.S. |
| Repeatability: | ± 0.5% F.S. |
| Long term stability zero N2: | < ± 1% F.S. / 24h |
| Long term stability span: | < ± 1% F.S. / month |
| Temperature influence of zero point: | < 1% F.S. / 10K |
| Temperature influence of span: | < 2% F.S. / 10K |
| Cross sensitivity: | < 2% F.S. |
| Pressure influence: | < 1.5% / 10hPa of reading |
| Warm-up time: | 1 min (initial), < 15 min for full specification |
| Response time (t90): | 1.5 – 15 sec |
| Sampling frequency by software: | ≤ 10 Hz |
| Detection limit: | See below |
| Resolution: | 0.5 x detection limit |
Electrical features
| Power supply: | 24 VDC incl. power plug 100 ~ 240 VAC / 24 VDC |
| Supply current (peak): | <0.4 A |
| Average power consumption: | < 7.5 W |
| Interface: | USB (standard), RS232 (option) – incl. data transmission cable 1 m |
| Analogue voltage output (option): | 0-2V / 0-5V / 0-10V |
Climatic conditions
| Operating temperature: | +5 ~ +45 °C |
| Storage temperature: | –20 ~ +60 °C |
| Operating pressure: | 800 ~ 1200 hPa (mbar) |
| Ambient humidity: | 0 ~ 95% rel. humidity // Condensing inside of sensor must be prevented! |