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The IM series in-line flow switch is designed to easily adapt to ¼” tubing. Please refer to the IX or FX series for larger line sizes.

These switches have no moving parts exposed to the product being monitored and offer an extremely reliable and repeatable instrument for sensitive process controls. 

The device operates by measuring the temperature differential between a heated and a reference temperature sensor.

The differential is greatest at no flow and decreases as flow is achieved across the sensor. This allows use in applications requiring a simple flow/no flow detection and for set-points at a predetermined flow rate.

Different flow ranges are shown in the set-point range section for water, hydrocarbons, and air/gas.
Features
  • ¼” Tubing Connection
  • 316L Stainless Steel Sensor
  • No Moving Parts
  • Temperatures to +250° F
  • Low Flow Rate Detection
  • Simple and Easy Field Calibration
  • Field Programmable for Relay Energization
  • Reliable and Cost Effective
  • Pressures to 2000 psiG

Specifications

Accuracy

  • ± 0.5 % of Range at Constant Conditions

Communication

  • Model MC-5 Calibrator

Cover - for Local Enclosure

  • Blind Cover

Electronics - Standard Features

  • Detects Min. Flow or Presence / Absence of Flow
  • Easy / Fast Calibration
  • Excellent Low Flow Sensitivity
  • Two Independent Relays

Enclosure, Body Material

  • 316L Stainless Steel

Flange Size - 1-1/2” (DN 40)

  • 1-1/2” (DN 40) - 150#
  • 1-1/2” (DN 40) - 1500#
  • 1-1/2” (DN 40) - 300#
  • 1-1/2” (DN 40) - 600#
  • 1-1/2” (DN 40) - 900#

Flange Size - 1-1/4” (DN 32)

  • 1-1/4” (DN 32) - 150#
  • 1-1/4” (DN 32) - 1500#
  • 1-1/4” (DN 32) - 300#
  • 1-1/4” (DN 32) - 600#
  • 1-1/4” (DN 32) - 900#

Flange Size - 1” (DN 25)

  • 1” (DN 25) - 150#
  • 1” (DN 25) - 1500#
  • 1” (DN 25) - 300#
  • 1” (DN 25) - 600#
  • 1” (DN 25) - 900#

Flange Size - 2” (DN 50)

  • 2” (DN 50) - 150#
  • 2” (DN 50) - 1500#
  • 2” (DN 50) - 300#
  • 2” (DN 50) - 600#
  • 2” (DN 50) - 900#

Input Power

  • 117 Vac (90-135 Vac)
  • 12 Vdc (+30 %, -10 %)
  • 200-240 Vac
  • 24 Vdc / Vac

Operating Pressure - Sensor

  • Vacuum to psig: 2,000 (bar: 138, MPa: 13.8)

Operating Temperature - Electronics

  • -46° to 65° C (-50° to 150° F)

Operating Temperature - Sensor

  • -46° to 177° C (-50° to 350° F)

Principle of Operation

  • Thermal, Calorimetric

Remote Electronics Enclosure & Cover

  • Blind Cover

Response Time

  • From 1 second

Sensor Assembly Body Lengths

  • 6” (15 cm)

Sensor Orientation

  • Horizontal

Sensor, Probe Style

  • InLine

Switch Point Range

  • Gases: 6.0 to 600 FPS, 1.82 to 182 MPS
  • Hydrocarbon-based Liquids: 0.06 to 8.0 FPS, 0.02 to 2.43 MPS
  • Water-based Liquids: 0.09 to 3.0 FPS, 0.03 to 0.91 MPS

Switch Type

  • DPDT 3 A or 10 A Resistive
  • SPDT 3 A or 10 A Resistive

Tube Connection

  • 1/4” Tubing (Inlet & Outlet)

Wetted Materials

  • 316L Stainless Steel

  • Pump Verification: Verifies pump operation, able to detect flow rates down to 0.09 cc/second in water
  • Bearing Lubrication: Detects loss of flow down to .06 cc/second in hydrocarbons
  • Seal Leakage: Verifies positive seal flow or detects excessive leakage indicating maintenance requirement
  • Chemical Feed, Dosing, and Metering Pumps: Indicates low or no flow of chemical additives to process
  • Spray Nozzles: Able to detect nozzle blockage in coating applications
  • Relief Valve/Rupture Disks: Alarms on burst or leakage of safety relief valves or rupture disks
  • Chiller Lines: Provides automatic shut down of chillers on low or no flow to prevent costly repairs
  • Analyzer/ Gas Chromatographs: Confirms continuous and/or sample flow to instruments
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