Opacity Monitor: SM-202

The SM-202 opacity monitor is an advanced dust particle and smoke monitoring system designed for use on a range of industrial applications. Using state of the art electronic design techniques, DynOptic Systems have created an opacity monitor that is rugged, accurate, and requires minimal maintenance.

Using the familiar light transmission opacity technique, a base measurement of transmission is made. From this the SM-202 can be calibrated to report in units of opacity (%), volumetric density (mg/m³), Ringelmann, MOR (km), extinction, and a variety of logarithmic functions.

The instrument consists of a pair of sensors (a transmitter and receiver) mounted on the stack using standard flange fittings, and an operator interface (a control unit) fitted up to 1km away, either at the base of the stack or in a control room.

All signal processing is performed in the sensors using the latest generation microprocessor electronics. Data is exported from the sensors via serial link (RS485) to the operator interface which has a human interface is the form of a display/keypad, and an electronic interface in the form of relay contacts, analogue outputs, and serial comms (RS232/485).

The sensors are of rugged construction with a high environmental rating. Both heads are supplied with stainless steel air purge bodies, which when connected to an airline will serve to protect the optical surfaces from dirt and particulate deposition – prolonging service intervals. The sensors themselves are attached to the back of the air purge bodies with quick release catches, affording speedy access to the lenses for ease of maintenance.

The operator interface is specifically designed for panel mounting, making the SM-202 ideal for integration into a wider emissions monitoring system. The human interface consists of a 4 digit LED display (visible in completely dark conditions) and a simple 4 button keypad. The wiring terminations are made into the back of the control unit via standard cable glands.

The SM-202 represents the perfect solution to your smoke or particulate monitoring requirement where a panel mounted control unit is preferred.