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 Diaphragm type Gauge & Switch - Model 140 / 141 Delta Meter
Model 140 / 141 Delta Meter
Model 140 / 141 Delta Meter
Literature Links

Product Bulletin Bulletin_140_12.pdf

Installation/Operation

IM140141.pdf
ElecIM140141.pdf
Install.pdf
Typical Manifold Installation

Special Notice About Chemical Seals

chemical_seals.pdf

The Mid-West Advantage:

Switch Configuration - Model 140 Delta Meter®Common Applications
  • Filter/Strainer Monitoring
  • Compressed Air, Hydraulic, Refrigerant
  • Pump Performance Testing
  • Heat Exchanger Pressure Drop Monitoring
  • Water Treatment Applications
  • Tank Level Monitoring Horizontal or Vertical
  • Flow Monitoring & Balancing

Product Features
  • 1 to 2 independently adjustable switches
  • 7 Position Terminal Strip (Standard)
  • Switches isolated from the process
  • Hermetically Sealed Switches
  • SPST (Normally Open) or SPDT Configurations
  • Most configurations CE marked to the Low Voltage Directive (EN 61010)
  • Multiple enclosure configurations. (see Table Below)
  • 5 Year warranty
  • Hazardous Locations approved assemblies available
Switch Specifications:

Electrical Configuration Matrix (Model 140/141)

OPTION
INTERFACE
MARKINGS
ENVIRONMENTAL
COMMENTS
A,B
Terminal Strip, 7 Position.  Access  for Conduit Hub or Cable Grip Connector
CE (Low Voltage)

NEMA 4X / IP 66 (Engineered Plastic)

Field Wireable.  Separate junction box is not required. Externally adjustable switch set points.
C,D
1/2" Conduit, Flying Leads, 18 Awg
CSA / UL  Class I, Division I, Groups C & D, Class II, Division I, Groups E,F & G
NEMA 7, with optional NEMA 4X
Explosion – proof design.  Externally adjustable switch set points.
E,F
1/2" Conduit, 7 Position Terminal Strip,
CE (Low Voltage), CSA /UL Div 2
NEMA 4X
Great Option for Hazardous Locations, Anodized Aluminum Enclosure

REED SWITCH RATINGS (Resistive Load)

Type
SPST 
SPDT
Option:
B (Normally Open)
A
*Power
25 W
3W
Max. Current
0.5  Amps
0.25 Amps
Max. Voltage VAC/VDC
240
125
Setting ( %F.S.)
15 to 90
15 to 90
Hysteresis (Max/Nom)
15% / 8% (F.S.)
10% / 5% (F.S.)
Repeatability
1% F.S.
1% F.S.
  * Product of the switching voltage and current shall not exceed the power rating of the device.