Carbon monoxide alarms ??-2?

Signalisers ??-2S, are designed to issue an alarm about exceeding the established values of maximum permissible concentrations of carbon monoxide, as well as issuing a signal to close the valve shut-off gas electromagnetic with pulse control with the ability to transmit information to external devices via RS485 interface or radio channel.
The principle of operation is based on the electrochemical method. Electrochemical cell, which is a sensitive element of the detectors, produces a current signal proportional to the concentration of carbon monoxide in the air. The current signal is converted by an operational amplifier into a voltage signal, which is compared with the voltage value set during thresholds setting, corresponding to the threshold carbon monoxide level. If the measured concentration of carbon monoxide in the air exceeds the threshold level, sound, light and control signals are generated in accordance with the logic of the detectors operation.