Differential pressure transmitter 4264A

piezoresistivestrain gaugesilicon

Overview
The modular high-performance differential piezoresistive pressure transmitter 4264A provides high accuracy and long-term stability in harsh environments with extreme temperatures, high vibration and shock. It measures static and dynamic differential pressures (dynamic response up to 2 kHz). Built-in electronics ensure temperature compensation, EMC protection, reverse polarity protection, power regulation, over-voltage and short-circuit protection, and configurable electrical outputs. Each unit is fully tested over pressure and temperature; test data are traceable to ISO 17025 and NIST.

Main features / advantages

• Pressure ranges: 0.1 to 10 bar (1.5 to 150 psi)
• Compensated temperature range: −40 to 120 °C (−40 to 250 °F)
• Dynamic response up to 2 kHz
• Accuracy 0.1% FS; annual stability 0.1% FS; proof pressure 300% FS
• Welded 316L stainless steel diaphragm with silicone oil pressure transmission
• Electrical outputs configurable: mV, V, mA
• Wide choice of pressure and electrical connections
• Hazardous-area certification options available

Construction and measurement principle
The sensing core is a micro‑machined silicon strain gauge (Wheatstone bridge) mounted inside a high-integrity seal. The sensing element is isolated from the pressure media by a welded 316L stainless steel diaphragm. Pressure is transmitted through incompressible silicone oil to the silicon sensing element. Silicon sensing delivers higher sensitivity, better repeatability, improved signal-to-noise ratio, greater overload capability and superior long-term stability versus metal strain-gauge sensors. The pressure-sensing assembly uses a patented sealing method (US Patent 7,373,827) allowing repeated cycles without fatigue and flexibility in pressure connection choices without adaptors or O‑rings.

Applications
Designed for industrial applications requiring precise static and dynamic differential pressure measurement in harsh conditions—typical uses include process control, hydraulic and pneumatic test benches, flow and leak testing, and aerospace and automotive test systems where dynamic response and long-term stability are critical.

Technical specifications

• Series / model: 4264A
• Measurement principle: piezoresistive (micro‑machined silicon, Wheatstone bridge)
• Pressure ranges: 0.1 to 10 bar (1.5 to 150 psi)
• Compensated temperature range: −40 to 120 °C (−40 to 250 °F)
• Dynamic response: up to 2 kHz
• Accuracy: 0.1% FS
• Annual stability: 0.1% FS
• Proof pressure: 300% FS
• Diaphragm material: welded 316L stainless steel
• Pressure transmission fluid: incompressible silicone oil
• Sensing element: micro‑machined silicon strain gauge (Wheatstone bridge)
• Built-in electronics: temperature compensation, EMC protection, reverse polarity protection, power regulation, over-voltage and short-circuit protection
• Electrical outputs: mV, V, mA (configurable)
• Certifications / options: hazardous-area certification available
• Sealing method: patented (US Patent 7,373,827)
• Test & calibration: individual pressure and temperature test data traceable to ISO 17025 and NIST