Applications: The Series C2 gage is the industry standard to measure fan and blower pressures, filter resistance, air velocity, furnace draft, pressure drop across orifice plates, liquid levels with bubbler systems and pressures in fluid amplifier or fluidic systems. It also checks gas-air ratio controls and automatic valves, and monitors blood and respiratory pressures in medical care equipment. Feartures: Wide choices of 56 ranges available to suit your needs Simple, frictionless movement, it quickly indicates low air or non-corrosive gas pressures-either positive, negative or differential The design resists shock, vibration and over-pressures No any fluid to evaporate, freeze or cause toxic and leveling problems It's inexpensive High accuracy-guaranteed within 2.5% of full scale Specifications Specifications: Service: Air and non-combustible compatible gases. (Natural Gas option available.) Housing: Die cast aluminum case and bezel, with acrylic cover, exterior finish is coated gray Accuracy: í+2.5% of full scale Pressure Limits: -70 to 100 KPa Size: 4" diameter dial face Temperature Limits: 20 to 140ípF (-6.67 to 60ípC) Mounting Orientation: Diaphragm in vertical position Connections: 1⁄8" NPT(F) high and low pressure taps, duplicated-one pair side and one pair back Weight: 500g Standard accessories: 1 m connecting tube, two 1⁄8" NPT plugs for duplicate pressure taps, two1⁄8" pipe thread to rubber tubing adapters and three flush mounting adapters with 3 screws Mounting and Options: They can be flush or surface mounted and pressure connected with standard hardware supplied With the optional A-610 Pipe Mounting Kit they may be conveniently installed on horizontal or vertical 11⁄4" -2" pipe Adjustable signal flag Integral with plastic gage cover. Available for most ranges except those with medium or high pressure construction. Can be ordered with gage or separate MODELS: Mode Range Fluid Used C1-3 0-3in.w.c. Red Oil C1-80 0-80mm w.c. Red Oil C1-700PA 10-0-700PA Red Oil