Main features
| Type of gas sensor | semiconductor (based on SnO2), exchangeable with sensory module |
| Disturbing factors | hydrogen, alcohol (high concentrations), other
hydrocarbons, chlorine; significant oxygen deficit (<19% of volume); substantial , rapid increase of humidity |
| Working temperature | recommended: 0 ° C to + 40 ° C; acceptable
periodically (<1h / 24h): -15 ° C to + 50 ° C |
| Relative humidity | recommended: from 30% to 90% |
| Alarm thresholds (applies for GS-21, GS-22) | 50 ppm carbon monoxide – ALARM within 60 ч 90 minutes; 100 ppm CO – ALARM within 10 ч 40 minutes;
300 ppm CO – ALARM before 3 minutes; according to PN-EN 50291-1 |
| Alarm threshold (applies to GS-21) | 15% DGW methane (± 5% DGW)
– ALARM within 1 min, according to PN-EN 50194-1. |
| Alarm threshold (applies to GS-22) | 15% DGW propane-butane (± 5% DGW)
– ALARM within 1 min. according to PN-EN 50194-1 |
| Measuring cycle | GS-21, GS-22 every 25 sec. ; microprocessor control, memory of approx. 1000 events (power failures, alarm and emergency states, working time
– read by the manufacturer |
| Expected operation time | 15 years from the date of manufacture (shown on the rating plate) |
| Optical signaling | lamp POWER / FAILURE – green (normal) or yellow |
| Sound signaling | (emergency) Sound signaling, ALARM light – red (alarm); detailed description of signaling Table 3; inner alarm
buzzer, intensity 85dB / 1m, pulsating tone |
| Outputs | “SYRENA” – voltage UN = 9V, Imax = 50mA,
“ALARM” – Umax = 24V AC; Imax = 100mA “PWRG” – Umax = 24V AC; Imax = 100mA |
| Dimensions, housing, weight | 140 x 85 x 55 mm; ABS housing;
degree of protection IPX2D; 0,4 kg |
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