3M Macurco CM-4 Fixed Gas Sensor Transducer, CM4, 12-24V, 4-20mA

Internal combustion engines (cars, forklifts, etc.) produce carbon monoxide (CO), an odorless, colorless and deadly gas. Operators of enclosed parking garages, warehouses, maintenance facilities, etc., can protect people by either ventilating, continuously or installing automatic fan control systems like the Macurco SS103 & DVP-120 Systems. Automatic fan control systems in parking garages normally have a short payback, because fans operate 1 to 2 hours a day rather than 24 hours a day. The CM-4 is powered from Macurco or other controllers, and provides a linear output to the controller. The CM-4 conforms to the specifications of most building codes, ASHRAE standards, and occupational health regulations. Typical codes require that CO exposure be 1: 35 ppm or less on the TWA (Time Weighted Average) basis over 8 hours, and 2: 200 ppm or less on the STEL (Short Term Exposure Limit) basis over a one hour period. Typical coverage is 5000 sq. ft. (464.5 sq. meters) per unit. . The CM-4 uses a long life solid-state sensor (7 – 10 year), which does not require regular re-calibration. The CM-4 replaces the SS102HC-1.

The Edwards 117 Series Strobes are designed for applications in industrial, commercial, and institutional applications where reliable and distinctive visual indication is required. The low profile 117 Series is ideal for industrial washdown applications as well as for use on tow motors and other vehicles. The strobe units provide a bright visual indication by utilizing a linear strobe tube inside a shatter resistant polycarbonate fresnel lens.Suitable for indoor or outdoor installation. When mounted outdoors the unit should be mounted with the lens facing up.Edwards strobe lights are particularly effective in high noise areas where ear protection must be worn and audible signals may not be heard or understood. They can advise personnel in manufacturing, process control and warehouse areas when an operation is starting or stopping or a vehicle is moving. They are also often used to signal equipment malfunction and to warn personnel that they are entering restricted areas.

The Edwards 878EX AC & 879EX DC Series are heavy-duty, high decibel, vibrating horn signals designed for use in hazardous locations. Two mounting brackets are provided on either side of the unit for wall mounting. The housing is tapped on one side for 3/4" (19mm) conduit to allow for field wiring installation. For use in dusty, hazardous atmospheres where a distinctive, urgent signal is required for timing, scheduling, paging and general alarm applications. Typical applications include use in mines, petroleum plants, gas plants, grain elevators, flour mills, paper mills, textile plants and tankers.