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Hazardous Location PDIS


Mid-West Instrument has been designing and manufacturing indicating differential pressure switches for use in Hazardous Locations for over 30 years. Their products carry CSA, UL, and or ATEX certifications that apply to the entire assembly as mandated by the applicable Hazardous Locations Standards. In order to mark their product with the CSA & UL marks, Mid-West Instrument is subject to unannounced visits by personnel from each certification lab 4 times per year. In addition, for the ATEX certification, they are subject to a comprehensive audit from a Notified Body representative once every year.  
   
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Model 120 - Explosion Proof

Model 120 - Explosion Proof

Functions and Applications The Model 120 piston style Differential Pressure Switch is  ...
Model 130 - Explosion Proof

Model 130 - Explosion Proof

Functions and Applications The Model 130 diaphragm isolated Differential Pressure Switch is ...
Model 140 - Explosion Proof

Model 140 - Explosion Proof

Common Applications Filter/Strainer Monitoring Compressed Air, Hydraulic, Refrigerant Pump ...
Model 220 - Explosion Proof

Model 220 - Explosion Proof

The Model 220 carries global certifications from CSA, UL, and ATEX. The piston style ...
Model 240 - Explosion Proof

Model 240 - Explosion Proof

The Model 240 carries global certifications from CSA, UL, and ATEX. The diaphragm isolated ...
Model 120 - Division 2

Model 120 - Division 2

Functions and Applications The Division 2 rated product is a lower cost alternative when ...
Model 140/142 - Divison 2

Model 140/142 - Divison 2

Functions and Applications: The Division 2 rated product is a lower cost alternative when ...
Model 220 - Division 2

Model 220 - Division 2

Functions and Applications The Model 220 classified for Division 2 locations provides another ...
   
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