Instrumentation
	Pressure	Transmitters and Sensors
	Weatherproof Pressure Transmitter      679				Pressure Transmitter                  638
		The Series 679 Pressure Transmitter				Series 638 Pressure Transmitters
		is compatible with a wide range of				employ a polysilicon sensor for
		gases and liquids, and is specially				superior long-term stability and
		designed for weatherproof service				repeatability with ±0.5% accuracy.
		(NEMA 4/IP56). The Model 679 can				They are FM approved intrinsically
		measure pressures with an accuracy				safe. Stainless steel NEMA 4X
		of ±.25%. This model provides a				enclosure is ideal for corrosive media
		4-20 mA output and is field adjustable.				in hazardous environments.
	Differential Indicating Pressure Transmitter  620				Differential Indicating Pressure Transmitter
		The Series 620 Pressure Indicating T				Series 621 Pressure Indicator is a 1/8
		ransmitter is a 1/16 DIN instrument for				DIN measuring and controlling
		measuring, controlling and indicating				instrument designed for positive,
		positive, negative or differential				negative or differential pressures of
		pressures of air and compatible				air and compatible gases. Pressure
		gases. Pressure measurements are				readings are displayed on a large -
		displayed on an easy-to-read 3-1/2				3-1/2 digit LCD display which unit
		digit display and converted to a				simultaneously produces a standard
		standard 4 to 20 mA output signal.				4-20 mA output signal.