CYX31 series pressure sensor

1 Overview

CYX31 series oil injection core pressure sensor is a joint type high temperature flat membrane pressure sensitive device. The core of the high-temperature joint is moved backward by the pressure chip to increase the heat sink. The welding diaphragm at the front of the thread is filled with silicone oil to conduct pressure. The joint part can withstand a high temperature of up to 200 ℃ to meet the needs of high temperature pressure measurement.

1.1 Recommended thread for CYX31 series oil injection core pressure sensor

The recommended standard threaded joints are M20×1.5, G1/2, and other threads need to be customized. The product is used for pressure detection of media compatible with 316L stainless steel and nitrile rubber or fluorine rubber.

1.2 Gauge pressure type for measuring negative pressure CYX31 series oil injection core pressure sensor model +Y

The negative pressure oil injection core pressure sensor is produced by a special process of negative pressure, which can reliably complete the detection of lower than atmospheric pressure, and the range is arbitrarily selected between -100kPa and 3MPa.

 

2 Product features

● Measuring range 0kPa～35kPa…10MPa

● With gauge pressure G, absolute pressure A and sealed gauge pressure S

● 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,

● level measurement, liquid level measurement,

● gas and liquid pressure measurement

● Pressure switch and hydraulic system

● Medicine and food equipment

4 Technical indicators

4.1 Electrical performance

● Power supply: ≤3.0mA; DC≤10V DC● Electrical connection: 0.2mm2 four-color 100mm silicone rubber flexible wire

● Common mode voltage output: 50% (typical value) of current type input, 40% (typical value) of voltage type input

● Input impedance: 2.7kΩ～5kΩ

● Output impedance: 3.0kΩ～6kΩ

● Response time (10%～90%): <1ms

● Insulation resistance: 500MΩ/100V DC

● Allow overvoltage: 1.5 times full scale

4.2 Structural performance

● Diaphragm material: stainless steel 316L

● Shell material: stainless steel 316L

● Pressure tube material: stainless steel 316L

● Pin Lead: Gold-plated Kovar

● Sealing ring: nitrile rubber, fluorine rubber (optional)
Net weight: 150g

4.3 Environmental conditions

● Vibration: no change under 10gRMS, (20～2000) Hz

● Constant acceleration: 100g, 11ms

● Media compatibility: 316L and nitrile rubber (optional fluorine rubber) liquid or gas

4.4 Benchmark conditions

● Medium temperature: (25±3)℃

● Ambient temperature: (25±3)℃

● Humidity: (50%±10%) RH

● Environmental pressure: (86～106) kPa

● Power supply: (1.5±0.0015) mA DC

 

4.5 Standard range sensitivity output and optional pressure form

 

Range	full range Output (mV)	pressure form		Range	full range Output (mV)	pressure form
0～35kPa	(40~120) ±20	G/A		0～1.0MPa	(55~145) ±20	G/A
0～70kPa	(20-140) ±20	G/A		0～2.0MPa	(50~160) ±20	G/A
0～100kPa	（50~145) ±20	G/A		0～3.5MPa	(60-150) ±20	G/S/A
0～200kPa	（30-125) ±20	G/A		0～6.0MPa	(60~130) ±20	S
0～400kPa	(40~150) ±20	G/A		0～10MPa	(40~110) ±20	S

 

4.6 Basic parameters

 

Parameters	Typical value	Maximum	Single
Zero output	±1	±2	mV
Non-linear	0.2	0.5	%FS
Late	0.05	0.08	%FS
Repeatability	0.05	0.08	%FS
Input/output impedance	2.6	5.0	kΩ
Zero temperature drift 1	±0.4	±1.0	%FS,@25℃
Sensitivity temperature drift 2	±0.4	±1.0	%FS, @25℃
Long-term stability	0.2	0.3	%FS/年
Excitation current	1.5（Maximum input voltage 10V）		mA
Insulation resistance	500（100VDC）		MΩ
Compensation temperature	0～50;-10℃～80℃		℃
Operating temperature	-40～+150（Threaded part）		℃
storage temperature	-40～+125		℃
Response time	≤1		ms
Housing and diaphragm materials	316L stainless steel
ED sealing ring	Fluorine rubber, nitrile rubber
Measuring medium	Fluid compatible with 316L, nitrile rubber or fluoroelastomer
Life (25℃)	＞1×108 pressure cycle (80%FS)		次
Filling medium	Silicone oil
ED sealing ring	Φ23.9×Φ18.5×1.5mm (Dingqing or fluorinated rubber Note 3)
Note 1, Note 2: The typical value of zero to 10 kPa temperature drift and sensitivity temperature drift is 0.5%FS@25℃, and the maximum value is 1.2%FS@25℃. Note 3: The temperature resistance range of fluororubber seals is -20℃～200℃, the low temperature performance is poor, when the temperature range is lower than -20℃, please verify the sealing.

 

5 Type selection structure

   

 

6 Schematic diagram and wiring

  

IN+(red line)-power supply positive IN-(black line)-power supply negative S+(yellow line)-output positive S-(blue line)-output negative

 

7 Application tips

● The hexagonal ED seal ring structure is recommended for the sealing method of the pressure core. When installing the thread, avoid excessive torque affecting the stability of the pressure core. It is recommended that the torque pressure range is not greater than the following values: 0 ~ 500kPa, 0.9Nm; 500kPa ~ 2MPa, 1.1Nm; 2MPa ~ 10MPa, 1.6Nm.

●  Pay attention to protect the front diaphragm of the pressure core and the compensation circuit board at the rear end, so as not to damage the performance of the pressure core or damage the core.

● Do not press the metal diaphragm with your hands or hard objects to avoid damage to the core due to chip deformation or perforation.

● The vent pipe at the rear of the G-type core body should be kept open to the atmosphere; it is forbidden for water, water vapor or corrosive media to enter the reference cavity at the rear of the core body.

● Avoid dropping, bumping, etc., which will affect the stability of the product.

● If there is a change in the pin lead, the actual physical label of the core shall prevail.

 

8 Selection guide

*Technology identification: f means general technology, Y means negative pressure technology.