The model 1950G Explosion Proof Switch combines the best features of the popular Dwyer Series 1950 Pressure Switch with the benefit of natural gas compatibility. Units are rain-tight for outdoor installations. The 1950G is compact , about half the weight and bulk of conventional explosion proof switches.
Dwyer ® Series Model 1950 Explosion-proof Differential Pressure Switch Made by Dwyer Instruments of Michigan City, Indiana See manufacturer's web page and detailed descriptionhttp://www.dwyer-inst.com/Product/Pressure/DifferentialPressure/Switches/Series1950
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Excellent condition but gently used (maybe 7 times, still in original box) Sonoline C Pocket Fetal Doppler/ Baby heart beat monitor (partial tube of gel included) for sale. Retails for $80 brand new (still available in stores and online). I never had a problem picking up the heartbeat and the functions of this device are easy to figure out and use.
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