Mid-West Instrument
Made in the USA
Tel: (586) 254-6500 · Fax: (586) 254-6509
6500 Dobry Dr., Sterling Heights, Michigan 48314
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Hazardous Locations PDIS - Models 120, 130, 140/141/142, 220, 240
Models 120, 130, 140/142, 220, 240

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.

HAZARDOUS LOCATIONS SWITCH SELECTION MATRIX
(Select Link for more detail) - Click here to convert to SI Units
 
EXPLOSION PROOF ENCLOSURES Division I, Category 2, or Zone I
 
Division II ENCLOSURES
MODEL
 
MINIMUM DP RANGE - PSID
5
5" H2O
25
5
20" H2O
5
20" H2O
5
MAXIMUM DP RANGE - PSID
110
400" H2O
100
100
100
110
100
100
MAX WORKING PRESSURE. - PSIG
5000
500
3000
Up to 4000
1500
5000
1500
Up to 4000
ACCURACY (% F.S.) *
2*
2* or 5
2*
2*
2*
2*
2*
2*
CONFIGURATIONS
                 
ATEX Ex d IIB + H2 IP65
     
X
X
       
CLASS I, DIV II, GRP. A,B,C,D,
CLASS II, DIV II, GRP F & G
 
 
 
 
   
X
X
X
CLASS I, DIV I, GRP. C, D;
CLASS II, DIV. I, GRP E, F, & G
X
X
X
         
 
CLASS I, DIV I, GRP B, C, D;
CLASS II, DIV I, GRP E, F, G
 
 
 
X
X
   
 
 
  CSA CERTIFIED
X
X
X
X
X
 
X
X
X
  UL LISTED
X
X
X
X
X
 
X
X
X
COLOR CODED FLYING LEADS
X
X
X
     
X
   
TERMINAL STRIP INTERFACE
 
 
 
X
X
   
X
X
NEMA 4X
OPT
OPT
OPT
 
 
X
X
X
IP65
 
 
 
X
X
     
1/2" CONDUIT / CABLE
X
X
X
X
X
X
X
X
SWITCH SPECIFICATIONS
                 
SPDT, 3W, 120 VAC/VDC,
0.25 AMPS
X
X
X

X

X
X
X
X
SPST, 25W, 240 VAC/VDC,
0.5 AMPS NO
   
X
   
 
X
 

SPST, 60W, 240 VAC/VDC,
3 AMPS NO

X

 

 

X

X
 
X

 

X

SPST, 60W, 240 VAC/VDC,
3 AMPS NC

X

 

 

X
   
X
 
X

SPDT, 60W, 240/VAC/VDC, 1 AMP

X

 

 

X
X
 
X
 
X

RELAY OUTPUT SPDT 10 Amps (Power req'd)

     
X
X
     
X

RELAY OUTPUT DPDT 10 Amps (Power req'd)

     
X
X
     
X

MISC FEATURES

                 

CE MARK (LOW VOLTAGE DIRECTIVE)

 

 

 

 

 

X

X

 

 
EXPLOSION PROOF ENCLOSURES Division I, Category 2, or Zone I
 
Division II ENCLOSURES
* Accuracy ASME B40.100 Grade B

Division I approved assemblies can also be used in Div II applications