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QTQ301/302/303 construction machinery pressure sensor

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Contact number:: +86-0731-81809600; +86-0731-85128155

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E-mail：: qitai@chntek.com

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Company address:: No. 22, Dingsheng Road, Liuyang Economic Development Zone (High-tech Zone)
Address of Marketing Center:: Room 1108, Floor 11, Building 2, Modern Service Industry Park, No. 118 Xiongtian Road, Furong District, Changsha City

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QTQ301/302/303 construction machinery pressure sensor

The QTQ300 series construction machinery pressure sensor is packaged with a metal-based pressure-sensitive chip independently developed and produced by our company. It is aimed at the serious cavitation, liquid hammer phenomenon and high pressure peaks in the hydraulic system of construction machinery, large power fluctuations, large vibration interference, and environmental Designed for harsh and other problems, fully meet the requirements of these working conditions. The biggest advantage of this product is impact resistance, high temperature resistance, good long-term stability and high reliability.

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Category：Pressure sensor/transmitter

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Product description

Parameters

1

product description

The QTQ300 series construction machinery pressure sensor is packaged with a metal-based pressure-sensitive chip independently developed and produced by our company. It is aimed at the serious cavitation, liquid hammer phenomenon and high pressure peaks in the hydraulic system of construction machinery, large power fluctuations, large vibration interference, and environmental Designed for harsh and other problems, fully meet the requirements of these working conditions. The biggest advantage of this product is impact resistance, high temperature resistance, good long-term stability and high reliability.

QTQ301 accuracy class 0.2%FS

QTQ302 accuracy class 0.5%FS

QTQ303 accuracy class 1%FS

2

Core capacity advantage

With an annual production capacity of 6 million cores, it has completely broken the pattern of foreign monopoly of the cores.

3

Packaging capacity advantage

The first packaging line with an annual output of 2 million pressure sensors was successfully put into production. Follow-up will continue to expand production.

4

Quality Assurance

Qitai has a mass-produced metal-based pressure-sensitive chip production line, a 100-level purification workshop, a fully automatic bonding machine, and fully complies with the ISO9001 quality management system to ensure product quality and consistency. The company is well aware of the importance of quality in product applications, and for this reason we have been doing everything possible to improve product quality. For an engineer, the worst thing is to stop work because of quality problems. Qitai attaches great importance to this problem and makes unremitting efforts to it. We promise to provide you with the greatest quality assurance. Qitai uses sputtering film technology, complete products and 100% final inspection quality assurance measures to ensure that customers do not Worry about quality problems again.

5

strong and sturdy

The QTQ300 series pressure sensor adopts a compact design of fully welded stainless steel, which can effectively protect the sensor under harsh working conditions. The electrical connector's protection level reaches |IP67, and has a sturdy internal structure design to ensure that the sensor can work normally in a high vibration environment.

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product features

◆The integrated pulse buffer provides a high level of anti-cavitation and anti-liquid hammer capabilities

◆Advanced anti-interference, anti-surge circuit protection and high-insulation withstand voltage film material

◆No oil-filled, fully welded stainless steel structure, will not cause thermal instability or leakage

◆Double gold wire lead technology, the lead is firm and reliable

◆The accuracy can be ensured in the temperature range of -40~+105℃

◆Wide pressure range, from 1MPa ~ 100MPa

◆Fast response speed, response time less than 1ms

◆0.2%FS, 0.5%FS, 1%FS full scale accuracy optional

◆The sputtering process, sputtering the strain resistance directly on the 17-4PH stainless steel substrate to ensure long-term stability, which is better than ±0.1%FS/year

◆Small hysteresis, good repeatability

◆Compact and small size, outer diameter ￠19mm, height 48mm

◆Low cost, can be used for mass OEM devices

◆Identifiable, unique ID number of sensitive chip

◆IP67 high protection level

7

application

Products widely used in cranes, excavators, boring machines, rotary drilling machine, trailer pump, car pump, pump, piling machinery, machinery fire safety, road machinery, loaders, shield structure machines, agricultural machinery with hydraulic system Construction machinery.

8

Product parameter

Performance parameter

Accuracy	± 0.2% FS 、 ± 0.5% FS 、 ± 1% FS
Long-term stability	±0.2%FS/year
Zero temperature drift	±0.1%FS/10℃
Full-scale temperature drift	±0.3%FS/10℃
Response time	≤1 millisecond
Durability	10 ⁸ pressure cycles

Range, overload pressure and failure pressure

Range MPa	1-10	16- 40	60	70-100
Overload pressure	3 times	3 times	2.5 times	2 times
Breaking pressure	40 times	10 times and ≤400MPa	≤400MPa

Note: higher overload pressure and failure pressure can be customized

Electrical parameters

Supply voltage	8-32VDC
Output	4-20mA, 0.5-4.5V voltage output, 0.5-4.5V proportional voltage output, 0-10V voltage output
load	Current output type: RL≤50×(Vcc-8)Ω Voltage output type: RL≥2 KΩ
Insulation resistance	≥1000MΩ/500VDC

Physical properties

Sensitive component material	17-4PH
Pressure port	See back pressure port
Electrical connections	See the electrical interface
Protection level	IP67

Environmental parameters

Medium temperature range	-40～+105℃
Ambient temperature range	-40～+105℃
Storage temperature range	-40～+105℃
Random vibration	20g, GB/T2423.56-2006
Sinusoidal vibration	14.1g, GB/T2423.10-2008
Shock	50g,11ms GB/T2423.5-1995
EMC- electromagnetic field radiation immunity	GB/T 17626.3-2016
EMC-electrostatic discharge immunity	GB/T 17626.2-2018

Wiring

Pressure port

Electrical Interface

Ordering guide

QTQ301 accuracy 0.2%	105 1 MPa	G2 G1/4 -19	A 4-20mA	01 M12X1
QTQ301 accuracy 0.2%	165 1.6 MPa	N2 NPT 1/4	B 0.5-4.5V voltage output	02 Direct outlet
QTQ302 accuracy 0.5%	255 2.5 MPa	M6 M20X1.5	C 0.5-4.5V proportional voltage output	03 Packard connector
QTQ302 accuracy 0.5%	046 4 MPa	M3 M12X1.5	G 0-10V voltage output	04 Hessman connector
QTQ303 accuracy 1%	066 6 MPa	G1 G1 / 8		05 AMP connector
QTQ303 accuracy 1%	106 10 MPa	G5 G1/4-19A		07 DEUTSCH DT04-4P
	166 16 MPa	G4 G1 / 2		08 DEUTSCH DT04-3P
	256 25 MPa	M4 M14X1.5
	406 40 MPa	M1 M8X1.25 internal thread
	606 60 MPa
	706 70 MPa
	107 100 MPa

Selection example: QTQ301 105 G2 A 01 =QTQ301 accuracy 0.2%FS Range: 1MPa Pressure interface: G1/4-19 Output: 4-20mA Electrical interface: M12X1

If you have any questions during the selection process or need special customization, please contact Qitai Sensing sales engineer for more detailed information and selection suggestions. Qitai Sensing serves you wholeheartedly.