Static Pressure SensorsThe A-300-K Series sensors are used with pressure transmitters and pressure switches to sense duct pressures. Two sensors are required to monitor pressure across coils, filters, blowers, etc. A-301-K and A-302-K have four radial sensing holes and 4" (10.2 cm) insertion depth. The A-308-K should be used only where accuracy is not critical. All mount in a 3/8" hole in the duct. If the interior of the duct is not accessible, an optional A-345-K flange mounting kit may be used.Room Static Pressure or Total Pressure Sensor KitThe versatile Model 60681 Pressure Sensing Kit is used for monitoring static pressure (aspiration) or total pressure (impact). The kit includes a 7" (17.8 cm) universal sensing probe, adjustable mounting flange, 1/4" adapter, and 3' (0.9 m) length of tubing (1/4" ID x 3/8" OD). For total (impact) pressure applications, install the curved tip opening facing into the air stream or away from the air stream for vacuum applications.Total Pressure SensorThe Model 21122 (4&#8243) and 21123 (8&#8243) sensors are used primarily for proving air flow in ducts. The opening in the tip of the 4" (10.2 cm) aluminum tube faces upstream and senses impact (total) pressure. The &#8243-112&#8243 models accept 1/8&#8243 to 1/4&#8243 ID flexible tubing.Outdoor Static Pressure SensorThe A-306-K Outdoor Static Pressure Sensor provides an outdoor pressure signal for reference in building pressurization applications. The A-306-K includes the sensor, 50' (15.24m) of vinyl tubing, mounting bracket, and hardware.Room Static Pressure SensorThe Model RPS is a stainless steel, wall-mounted room static pressure sensor. It mounts directly to the wall or to a standard electrical box. The Model RPS-W is a white plastic, wall-mounted room static pressure sensor, and the Model RPS-I is ivory. The RPS sensors have a 100 micron stainless steel breather vent.Filter KitThe Model A-605 Filter Kit includes an aluminum surface mounting bracket and screws, two 5 ft lengths of 1/4" aluminum tubing, two static pressure tips, and two plastic vent valves.Surge DampenerSurge Dampener Model SD-01 absorbs rapid pressure fluctuations to provide steady pressure outputs. The dampener has two independent channels - one for the low pressure tubing and one for the high pressure tubing. Surge dampeners are typically used with outdoor pressure sensors, which are subject to wind gusts, and isolation rooms, clean rooms, or operating rooms where opening or closing doors creates sudden pressure changes.