MFD-4 Sensor

  • Used with suction-type abrasive blasting machines
  • 24 Vdc
  • Non-ferrous media

To order:
Phone: 574-256-5001 or 1-800-832-5653

CPN: 999379



  • For non-ferrous media
  • Requires little maintenance due to no moving parts
  • Operates from 24 Vdc
  • Relay contact output
  • Push-button setup
  • LED indicators
  • CE compliant

The MFD-4 is a media flow detector for suction-type abrasive blasting machines. The MFD-4 uses a charge-coupled amplifier that is connected to a sensing pin. The pin is inserted into the flow path of the abrasive blasting media. Each particle passing the pin shares a minute charge with the pin. This charge is converted to a voltage that is used to activate an output relay contact.

Setup is simple. The zero and span functions are automatic—pushing the “zero” button acquires zero for the no-flow condition and pushing the “flow” button sets the sensor gain and activates the relay. The relay contact will transfer whenever the flow is 50-100% of the programmed setting.

The MFD-4 is enclosed in a rugged aluminum housing. It can be attached to the media blast hose at any location and in any orientation via a sensing pin that protrudes from the bottom of the mounting base. (A sensing pin is included with the MFD-4. Replacement pins are available from Electronics Inc. See below.)

Cable and Pin Ordering Information


Mating Plug and Cable Replacement Sensor Pins
6′ / 1.8 m 940010 1.12″ 940090
12′ / 3.5 m 940011
15′ / 4.5 m 940012



Ouputs Form “A” relay contact
30 Vdc @ 1A
Inputs 24 Vdc @ 0.060a
LED Indicators Yellow: Power okay
Red: No flow
Green: Flow Okay
All LEDs blinking: No signal acquired
or unstable flow


MFD-4 Sensor Dimensions - Electronics Inc