APSA-370/CU-1 Ambient H2S monitor measures SO2 converted H2S through oxidation catalyst based on Ultra Violet Fluorescence. In order to reduce measurement error by water concentration fluctuatin in ambient, humidifier is set at sample line. It enables long-term stability according to stabilizing catalytic reaction.
Measurement component | Hydrogen sulfide (H2S) |
| Measurement principle | Oxidation catalyst + Ultra Violet Fluorescence |
| Measurement range | 0-0.1/0.2/0.5/1.0 ppm |
| Lower detectable limit | 2 ppb |
| Repeatability | ±3.0% of F.S. |
| Linearity | ±2.0% of F.S. |
| Zero drift | ±2% of F.S./day |
| Span drift | ±5% of F.S./day |
| Response time (T90) | 180 sec. or less (from CU-1converter unit) |
| Sample gas flow rate | approx. 0.7L/min |
| Operation gas | None |
| Indication | Measuring value, alarm |
| Alarm | APSA-370: Calibration error, Battery error, Flow rate error, Pressure error, Temperature error in catalyzer, etc. CU-1: Temperature error in catalyzer |
| Inpt/Output | 0-1V/0-10V/4-20mA (2 systems: either (1) momentary value and integrated of (2) moving average value) Contact input/output RS-232C (option) |
| Temperature/Humidity | 0-40°C / 85% or less |
| Power | 100/110/115/120/220/230/240 VAC, 50/60Hz |
| Power consumption | APSA-370: 150VA CU-1: 150VA |
| Dimension | APSA-370: 430(W) x 550(D) x 221(H) mm CU-1: 430(W) x 550(D) x 221(H) mm |
| Mass | APSA-370: approx. 19kg CU-1: approx. 10kg |
