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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Differential Pressure Piston Type Gauge & Switch - Model 122
Model 122
Literature Links

Product Bulletin Bulletin_122_11.pdf

Installation/Operation

IM122.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 122
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
  • Clamp or Stick on 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)
  • 5 Year warranty

Switch Specifications:

Electrical Configuration Matrix (Model 122)
OPTION
INTERFACE
MARKINGS
ENVIRONMENTAL
COMMENTS
M,N
Flying Leads, 22 Awg
CE (Low Voltage)
Weather Resistant
Economical Configuration, Potted, Clamp-on, Adjustable Switch
R,S
Flying Leads, 22 Awg,
CE (Low Voltage)
Weather Resistant Flat Pack (Preset)
Economical Configuration, Molded Case, Non-Adjustable Switch

REED SWITCH RATINGS (Resistive Load)

Type
SPST 
SPDT
SPDT
Option:
E
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 100
25 to 100
10 to 100
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.