Mid-West Instrument
Tel: (586) 254-6500 · Fax: (586) 254-6509
6500 Dobry Dr., Sterling Heights, Michigan 48314
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Differential Pressure Piston Type Gauge and Switch - Model 123
Model 123
Literature Links

Product Bulletin bul123_06.pdf

Installation/Operation

IM123.pdf
IM123elec.pdf
Install.pdf
 Typical Manifold Installation
The Mid-West Advantage:
  • 5 Year Warranty
  • 30 + Years Hazardous Location product manufacturer.
  • OEM capability
  • Fast on-time Deliveries
  • Friendly Customer Support
  • 3rd Party Certified Quality System
Switch Configuration - Model 123
Common Applications
  • Filter/Strainer Monitoring
  • Compressed Air
  • Hydraulic
  • Refrigerant
  • Pump Performance Testing
  • Heat Exchanger Pressure Drop Monitoring
Product Features
  • 1 to 2 independently adjustable switches
  • Hermetically Sealed Switches
  • SPDT, SPST Normally Open Configurations
  • Most configurations CE marked to the Low Voltage Directive (EN 61010)
  • Power Ratings ranging from 3 Watts to 60 Watts (Great for upgrades to handle cable lengths beyond 70 ft.) (see Table Below)
  • Numerous enclosure configuratons. (see Table Below)
  • DIN connector (New popular field wireable interface)
  • 5 Year warranty
Switch Specifications:

Electrical Configuration Matrix (Model 123)

OPTION
INTERFACE
MARKINGS
ENVIRONMENTAL
COMMENTS
A,B
Flying Leads, 22 Awg.
CE (Low Voltage)
Weathertight
Economical Configuration
C,D
1/4" NPT, Flying Leads, 22 Awg.
CE (Low Voltage)
NEMA 4X
Most Economical NEMA 4X Configuration
E,F
1/2" Conduit, Flying Leads, 18 Awg.
CE (Low Voltage)
NEMA 4X
Great Option for Hazardous Locations (Not Listed)
L,M
Plug-In Connector DIN 43650
CE (Low Voltage)
NEMA 4X
Connector (IP65)
Connector CSA/UL approved for general purpose wiring. Field Wireable. Very Popular Option.

REED SWITCH RATINGS (Resistive Load)

Type
SPST 
SPDT
SPDT
Option:
E, F, G
H
A
*Power
60 W
60 W
3W
Max. Current
3.0  Amps
1.0 Amps
0.25 Amps
Max. Voltage VAC/VDC
240
240
125
Setting ( %F.S.)
25 to 95
25 to 100
10 to 90
Hysteresis (Max/Nom)
15% / 8% (F.S.)
20% / 13% (F.S.)
10% / 5% (F.S.)
Repeatability
1% F.S.
1% F.S.
1% F.S.
Leads 22 Awg. (per switch)
(2),  24"
(3),  24"
(3), 24"

  * Product of the switching voltage and current shall not exceed the power rating of the device.