Mid-West Instrument
Tel: (586) 254-6500 · Fax: (586) 254-6509
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Hazardous Locations Differential Pressure Switch - Model 220 Hazardous Locations Differential Pressure Switch - Model 220
Model 220

The Model 220 carries global certifications from CSA, UL, and ATEX. The piston style Differential Pressure Switch is CSA Certified to both the Canadian and U.S. Standards and U.L. Listed to the U.S. Standards. Certified to ATEX directive Ex d, IIB + H2 with an IP65 rating.

Mid-West Instrument's new Hazardous Locations "Delta P" switches are provided with a field wireable terminal strip. The terminal strip eliminates the need to add a costly explosion-proof junction box near the switch. Multiple outputs are available ranging from low power reed switches to higher load switching relay outputs.

Features and Benefits
A competitively priced Indicating Differential Pressure Switch for use in measuring the pressure drop across filters, strainers, separators, valves, and pumps in Hazardous Locations.

  • Simple, Rugged, Compact Design
  • Working Pressure 3000 PSIG (200 bar)
  • Over-range Protection to Maximum Presssure
  • Captive Cover Screws
  • The Entire Assembly is Certified for Hazardous Locations
Model 220
Model 220
Literature Links

Bulletin Bul220.pdf

Installation/Operation

IM220ATEX.pdf
IM220Div.pdf
install.pdf
 Typical Manifold Installation

The Mid-West Advantage:
Certifications:  
  • CSA Certified, UL Listed, Class I, Division 1, Groups B, C, D;
    Class II, Division 1, Groups E,F, & G.
  • ATEX Certified, Ex d IIB + H2   II 2GD IP65

Switch Options:

Type
SPST **
SPDT
SPDT
DPDT Relay
ELEC Spec.
A
A
A
B,C,D,E,F,G, H
Output Option Code
E ,F,G
H
A
R
†Power
60 W
60 W
3W
N/A
Max. Current
3.0  Amps
1.0 Amps
0.25 Amps
10 Amps

Max. Voltage VAC/VDC
240
240
125
277 / 30

Setting (%F.S.)
25% to 95%
25% to 100%
10% to 90%
15% to 90%

Hysteresis (Max/Nom)
15%/8% (F.S.)
20%/13% (F.S.)
10%/5% (F.S.)
20%/10% (F.S.)
Repeatability
1% F.S.
1% F.S.
1% F.S.
1% F.S.

† Product of the Switching Voltage & Current shall not exceed the power rating
** Available Normally Open or Normally Closed

  • Set Point Accuracy: 2%*
  • Interface:  1/2” Conduit / Cable Entry with 16 Position Terminal Strip
  • Enclosure:  NEMA 7 / Ex "d" (Flame-proof), IP65 Weatherproof rating
  • Switch Adjust: Internal to the Enclosure
  • Input Power: None. (For Reed switch Outputs) ; Required for Relay Output

Body:

  • Working Pressure:  4000 PSIG (Division Classification) / 3000 PSIG (ATEX)
  • Differential Over-range:  Same as Working Pressure
  • Range: 0-5 PSID (0-0.35 bar) to 0 -100 PSID (0-7 bar)
  • Process Connections: 1/4” FNPT End Connected (Standard)
  • Materials:  AL, 316 / 316L SS,

Indicator:

  • Accuracy:  2%* 
  • Dial Size:  4 1/2” Standard None (Switch Only)

Model 220 Div II information
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*  ASME B40.100 Grade B