+44 (0) 1403 713772

Control & Instrumentation Expertise Since 1982

Home » Applications and Articles » Blocked Chute Protection – Hawk Measurement Gladiator Microwave Switch

Blocked Chute Protection – Hawk Measurement Gladiator Microwave Switch

Application problem:

The customer had problems getting early enough indication of blocked chute on a critical application on a feeder to vibrating screen with mixed particle sizes.

Speed of response was critical and probes proved unsuitable, because “on” delays had to be used to overcome intermittent impact by the product on the probes.

The customer wanted a fully fail-safe blocked chute switch that could be pre-tested on each start-up of the conveyor system. Each blocked chute problem was costing the clients thousands of dollars in down time.


HAWK used its non-intrusive Gladiator range remote Microwave switches. Because there was high impact and vibration in the transfer chutes, the Gladiator has a toughened wear resistant “UHMW” Polyethylene face and mounted the Microwave sender and Microwave receiver remotely.

The Microwave amplifier was mounted in an area where maintenance personnel could gain access. With the Gladiator Microwave separation between amplifier and sensors can be up to 500m. The Microwave worked in all conditions, with dry material, wet material, fines and bulk material. Build-up inside the chute only marginally reduced the signal strength of the Microwave.

The client also used the remote pre-test feature to check that the Microwave was working, each time the conveyor system started up.

Ordering information:

• Amplifier: GSASUS
• Sender: GMSB101XX
• Receiver: GMRR101XX
• Window/Weldment – MA4
• Connection Cable – CA-GMR20M

Integral version also available
• Integral Receiver: GMSRU101SX
• Integral Sender: GMSU101XX

For more information on the product used in this application