Overview / Design Principle:

The 265 Series are very low-pressure transducers for ranges as low as 0.25" W.C. and feature ±1% full-scale static accuracy. Primarily used in Building Energy Management these transducers are capable of measuring pressures and flows with the accuracy necessary for proper building pressurization and air flow control. 265 Series transducers utilize an all-stainless steel micro-tig welded sensor that allows up to 10 psi overpressure (in either direction) with no damage to the unit. All sensor components have thermally matched coefficients, resulting in improved temperature performance and excellent long-term stability.

How They Operate:

A tensioned stainless steel diaphragm and insulated stainless steel electrode, positioned close to the diaphragm, form a variable capacitor. Positive pressure moves the diaphragm toward the electrode, increasing the capacitance. A decrease in pressure moves the diaphragm away from the electrode, decreasing the capacitance. The change in capacitance is detected and converted to a linear DC electrical signal by Gems Sensors & Controls’ unique electronic circuitry.

Applications:

• HVAC
• Energy Management Systems
• Variable Air Volume and Fan Control (VAV)
• Environmental Pollution Control
• Static Duct and Clean Room Pressures
• Oven Pressurization and Furnace Draft Controls