MFD-250 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: 999375



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

The MFD-250 is a media flow detector for suction-type abrasive blasting machines. It uses a charge-coupled amplifier that is connected to a sensing pin placed in the flow path of the abrasive blasting media. Each particle passing the pin shares a minute charge with the pin, converting it to a voltage used to activate the 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-250 is enclosed in a 3.6″ x 1.5″ x 1.5″ aluminum housing and is attached to a sensing pin in its mounting base. The 6-pin plug allows for easy connection of the sensor to the power supply and machine controls. The sensor is placed in the blast hose near the mixing chamber. LEDs on the top of sensor indicate green for “Flow OK” or red for “No Flow”. The internal relay is activated during green “Flow OK”.


Cable Ordering Information

Cable is ordered separately.  Three lengths are available:

6′ / 1.8 m 940010
12′ / 3.5 m 940011
15′ / 4.5 m 940012


Size ID: 0.25″NPT
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-250 Sensor dimensions