1 Overview

The CYX23/25 series oil-filled core pressure sensors are connector-type flat diaphragm sensors. They utilize an internationally advanced, highly stable, high-precision silicon pressure chip and a stress-optimized sintered base. They are manufactured through a process involving surface mount assembly, wire bonding, diaphragm welding, high-vacuum oil filling, pressure cycling stress relief, high-temperature aging, and temperature compensation. Over 30 years of research, production experience, and process innovation have resulted in these sensors offering exceptional stability and performance, earning widespread customer recognition.

1.1 Recommended threads for CYX 23/25 series oil-filled core pressure sensors 

The recommended standard threaded joints are M20×1.5 and G1/2. This product is suitable for pressure testing of media compatible with 316L stainless steel, NBR, or FKM.

1. 2 Gauge pressure type CYX 23/25 series oil-filled core pressure sensor for measuring negative pressure + Y after the model 

 The negative pressure oil-filled core pressure sensor is produced using a special negative pressure process and can reliably complete detection below atmospheric pressure. The measuring range is arbitrarily selectable between -100kPa and 3MPa.

2 Product Features

• Measuring range 0kPa～10kPa…10MPa
• Available in gauge pressure G, absolute pressure A and sealed gauge pressure S forms
• Constant current/constant voltage power supply
• Isolated structure, suitable for a variety of fluid media
• M20×1.5, G1/2 thread optional
• All 316L stainless steel

3   Main uses

• Industrial process control                  ●   Liquid level measurement                 ●   Gas and liquid pressure measurement
• Pressure switches and hydraulic systems         ●   Medical and food equipment      

4   Technical indicators

4.1 Electrical performance 

• Power supply: ≤3.0mA; DC≤10V DC
• Electrical connection: 0.2mm ² four-color 100mm silicone rubber soft wire
• Common mode voltage output: 50% (typical) of current type input, 40% (typical) of voltage type input
• Input impedance: 2.7kΩ～5kΩ
• Output impedance: 3.0kΩ～6kΩ
• Response time (10% to 90%): <1ms
• Insulation resistance: 500MΩ/100V DC
• Allowable overvoltage: 1.5 times full scale

4.2 Structural performance 

• Diaphragm material: stainless steel 316L
• Shell material: stainless steel 316L
• Pressure pipe material: stainless steel 316L
• Pin leads: Gold-plated Kovar
• Sealing ring: NBR, fluororubber (optional)
• Net weight: about 50g (CYX23), 70g (CYX25)

4.3 Environmental conditions 

• Vibration: No change at 10gRMS, (20～2000) Hz
• Constant acceleration: 100g, 11ms
• Media compatibility: 316L and NBR (optional fluororubber) liquid or gas

4.4 Reference conditions 

• Medium temperature: (25±3)℃
• Ambient temperature: (25±3)℃
• Humidity: (50% ± 10%) RH
• Ambient pressure: (86～106) kPa
• Power supply: (1.5±0.0015)mA DC\

• Range	Full scale Output (mV)	Pressure form		Range	Full scale Output (mV)	Pressure form
  0～10kPa	(30～120)±20	G		0～1.0MPa	(55～145)±20	G/A
  0～35kPa	(40～120)±20	G/A		0～2.0MPa	(50～160)±20	G/A
  0～70kPa	(20～140)±20	G/A		0～3.5MPa	(60～150)±20	G/S/A
  0～100kPa	(50～145)±20	G/A		0～6MPa	(60～130)±20	S
  0～200kPa	(30～125)±20	G/A		0～10MPa	(40～110)±20	S
  0～400kPa	(40～150)±20	G/A