Service and Repairs

The importance of calibration with using electro-chemical cells for measuring toxic gas is that their working life is determined by the activity of the electrodes used to detect the gas. This activity is gradually reduced over time by contaminant gases and poisons such that the sensor sensitivity is the amount of current generated per ppm of target gas - drifts gradually downwards. If the instrument into which the sensor is built is calibrated regularly as recommended, this downward drift can be compensated for by gain adjustment and any low output sensors replaced immediately. Therefore it is important that the instruments are calibrated regularly to confirm that the cell is functioning properly and correctly.