Simple Pneumatic System Monitors Ice Cream Levels at Birds Eye Walls

When Birds Eye Walls required an effective system for monitoring level in an ice cream vessel, the company chose a simple CT Holledge pneumatic level system from Canongate Technology Ltd.

The pressure balance system, which consists of CT Holledge PB pressure transmitters connected to an HF air flow regulator and remote electronics supplying a 4..20mA output, was installed at Birds Eye Walls in a range of tanks in Gloucester The system was specified because of its record of long-term stability and Birds Eye Walls hoped that it would solve previous difficulties it had encountered when measuring level.

With a wide range of applications in the food industry, the CT Holledge system is capable of sensing process pressures from a few millimetres water gauge to 14 bar using a relatively simple process. The analogue output means that the PB system can be easily integrated with electronic displays, SCADA control and monitoring facilities or PLC's.

Engineers at Birds Eye Walls were originally using electronic pressure transmitters to monitor level in the vessels at the plant. These tended to "drift" over time due to the extreme temperature cycling of the process. The CT Holledge system underwent lengthy trials at the plant to prove its performance over time. Birds Eye Walls engineers found that the system offered simple, accurate and reliable level monitoring over the several months of trials.