APG Pressure Transducer and Hammer Union Pressure Transducer

APG's story begins with a Utah State University graduate using his engineering skills to make a difference in the lives of farmers. Cordell Lundahl designed an ultrasonic sensor and control system that could guide farm machinery around the uncut edge of a field. A farmer, riding in a second machine, could effectively make two cuts with one pass leaving more time for all the other unending farm chores. Fast-forward 40 years, and APG now offers a full line of level sensors and switches, pressure transducers, and data management tools to help everyone from farmers to chemists, and waste managers to food and beverage producers control their processes and inventories.

Our pressure transmitters, also known as pressure transducers, use piezoresistive technology to accurately measure pressure. This is based off of a small circuit called a Wheatstone bridge attached to the back of a diaphragm. As the diaphragm flexes from pressure, the resistance in the Wheatstone bridge (hereafter known as the “sensing element”) changes relative to pressure, providing a basis of measurement.

There are a few different methods of mounting the sensing element to the pressure transmitter diaphragm. Each has it’s own set of pros and cons. For example, some perform better in low pressure environments, others in high pressure. We’ll use the best method according to the configuration of your sensor. Once the measurement is taken, the transmitter conditions the signal to the output you have chosen and sends it off to your control system.

Like all of our pressure transmitters the hammer union pressure transducer uses piezoresistive principles to monitor pressure on a diaphragm. The real difference is how it’s constructed to handle the shock, vibration, weather, and rough handling that prevails on a drilling or production rig.

Pressure Transducer

• Explosion Proof, Heavy Duty Pressure Transducer PT-405
• Intrinsically Safe, Heavy Duty Pressure Transducers PT-400
• Industrial Pressure Transducer PT-200
• Industrial Pressure Transducers with Amplified Output PT-L1/L3/L10
• Industrial Pressure Transducers with Millivolt Output PT-L9/L13/L14

Hammer Union Pressure Transducer

• Hammer Union Pressure Transmitter HU-1502
• Recalibratable Incoloy Hammer Union Pressure Transmitter HU1502I
• Hammer Union Pressure Transmitter HU-2202