Our technical support team is dedicated to solving any problems that occur during the entire life cycle of your use of our products.

> Support > Technical Solution

01. I do not get any output signal from my pressure transducer? What should I do?

If you do not get an output signal from your pressure transducer, here are a few steps you can take to troubleshoot the issue:


  • Check the power supply: Ensure that the transducer is connecting the correct power supply voltage. Verify that the power source is functioning properly and providing the required voltage.
  • Check the wiring: Double-check the wiring connections between the transducer and the data acquisition system or control device. Make sure all connections are secure and properly connected according to the manufacturer's instructions.
  • Inspect for damage: Check the transducer for any physical damage or signs of wear. Look for loose or broken wires, damaged connectors, or any other visible issues that could be affecting the signal.
  • Calibrate the transducer: If the transducer has a calibration procedure, follow it to ensure it is properly calibrated. Incorrect calibration can result in no output signal or inaccurate readings.

Test with a known pressure source: Connect the transducer to a known pressure source, such as a pressure gauge or another calibrated transducer, to verify if it is functioning correctly. If the known pressure source produces an output signal, it indicates that the transducer may be faulty.


If at any time you are uncertain on how to perform these tests, please contact us  and we will be happy to walk you through the appropriate steps.

02. How does the pressure sensor prevent overload?

Reasonable selection of pressure range: When selecting a pressure sensor, select the appropriate range according to the maximum pressure range of the actual application scenario. Ensure that the sensor's range is greater than the actual working pressure to avoid overload.


Install overload protection device: Install overload protection device at the input or output end of the sensor, such as overload protection valve, overload protection circuit, etc. When the pressure exceeds the set value, the overload protection device will automatically cut off or limit the input signal of the pressure sensor to protect the sensor from overload damage.


Regular calibration and maintenance: The pressure sensor is calibrated and maintained regularly to ensure its accuracy and reliability. Calibration can detect sensor drift or failure in time, and maintenance can clean the sensor and check for damaged or worn parts.


Avoid shock and vibration: The pressure sensor should avoid severe shock and vibration during the working process, because these will adversely affect the measurement accuracy and reliability of the sensor. You can take vibration isolation measures, such as vibration isolation pads and supports.

Working environment: When selecting and installing pressure sensors, it is necessary to consider the characteristics of the working environment, such as temperature, humidity, corrosion, etc. Select the sensor material and sealing method suitable for the working environment to ensure the stability and durability of the sensor in harsh environments.


Through the above measures, the pressure sensor overload can be effectively prevented, its service life can be extended and the measurement accuracy and reliability can be improved.

03. I need a pressure sensor that operates off of a supply voltage under 5V. can you help?

With the increased popularity of IoT and remote monitoring applications, lower current consumption and sensors operating from lower voltage power supplies has increased. we manufactures a variety of low-powered pressure transducers that operate from 3-5VDC of unregulated power and produces a 0.5-2.5V/RS485/IIC output signal. The current consumption is ≤ 3mA. While millivolt output pressure sensors are available, this is amplified from the traditional millivolt signal, giving greater calibration capabilities through a digital ASIC as well as more signal for users to use in the field.

04. What are the causes of pressure sensor damage?

1. Do not touch the diaphragm with hard objects, which may cause damage to the isolation diaphragm.

2. The measured medium is not allowed to freeze, otherwise the isolation diaphragm of the sensor element will be damaged, resulting in damage to the sensor. If necessary, the sensor should be temperature protected to prevent icing;

3. When measuring steam or other high temperature media, the temperature should not exceed the limit temperature when the sensor is used, and the heat dissipation device must be used when the limit temperature is higher than the pressure sensor;

4. Do not use a voltage higher than 36V to add to the sensor, resulting in sensor damage;

If you do not understand or need to consult related products, you can contact customer service. Thank you all for your support.


05. Which output signal should i choose?

Selecting the appropriate output signal depends on a few pieces of information regarding the application. Is this an existing setup where the output signal is already defined? What is the supply voltage available to power the sensor? How far do you need to transmit the output signal of the sensor? All of these application questions will help guide us to the most appropriate output signal. We can offers:

· 4-20mA, 2-wire output signals

· Voltage output signals (0-5V, 0-10V, 1-5V, 1-10V, 0.5-4.5V etc.)

· Millivolt output signals (10mV/V, mV uncompensated, etc.)

· Digital output (RS485 /IIC).

06. What is a bi-directional pressure sensor?

A bi-directional pressure sensor is a type of sensor that can measure pressure in both positive and negative directions. It is capable of detecting and measuring changes in pressure, whether it is an increase or decrease in pressure.

A bi-directional pressure sensor is ideal for applications such as vapor recovery. The positive end of the pressure transducers measurement range is used to monitor the increase in vapor pressure at the top of the storage tank and the negative end of the measurement range is used to monitor the suction when recovering the vapors from the tank.

07. What is a compound pressure transducer and how do i calculate the output signal?

A compound pressure transducer has an offset “zero” output signal such that the baseline signal measures a full vacuum pressure range of -14.7 PSI (or -1 bar). Typically this is offered for gauge and some sealed gauge pressure sensors and transducers. Applications include compression equipment and HVAC/R.

08. What is the difference between compound and absolute pressure?

Compound pressure sensors are very similar to absolute sensors in that they both measure a vacuum. The difference is how the vacuum is displayed by the sensor.

In a compound pressure sensor, the sensor is zero referenced to atmospheric pressure. When measuring a vacuum, a compound pressure sensor will display a negative number. For example, a 10 PSI vacuum would display as -10 PSI with a compound pressure sensor.

In an absolute pressure sensor, the sensor is zero referenced to a full vacuum. When measuring a vacuum, an absolute pressure sensor will display a positive number. Using the same example as the compound pressure sensor above, a 10 PSI vacuum would display as +10 PSI with an absolute pressure sensor.

0 PSI absolute is equal to about -14.7 PSIG.

09. My application is considered a hazardous location. Can you help?

We can certainly try to help! Please provide me with more details about your sensor application and the specific challenges or concerns you are facing in the hazardous location.

10. What is the difference about gauge, sealed gauge, and absolute pressure?

Gauge – Gauge pressure refers to pressure measurements in relation to atmospheric pressure. A gauge pressure sensor has either a vent hole or vent tube that allows the back side of the sensors diaphragm (internal to the sensors housing) to see the same atmospheric pressure as the pressure port side of the diaphragm. This is why gauge sensors read zero pressure when the port is open to atmospheric pressure. Gauge pressure reference is commonly used in low pressure applications as changes in barometric pressure from weather or altitude changes can have a considerable effect on the output of the sensor.

Sealed Gauge – Sealed gauge refers to a sensor that has atmospheric pressure sealed on the inside of the sensors housing. There are no vent holes or vent tubes. The atmospheric pressure sealed inside the sensor is determined at the time of welding. Sealed gauge reference is common in high pressure applications where changes in atmospheric pressure have a negligible effect on the output of the sensor. Customers may also consider a sealed gauge reference in applications where a lot of moisture or high pressure washdowns occur.

Absolute – Absolute pressure refers to pressure measurements in relation to a full vacuum. For example, if an absolute pressure sensor is held open to the air then the sensor will read the actual barometric pressure at that location. Therefore, absolute pressure sensors are affected by altitude changes and other barometric changes.


Rm. 1208, Building B, Huixin IBC, No. 1 Zhang Bayi Road, High-tech Zone, Xi'an, Shaanxi, China

Copyright © Xi'an Gavin Electronic Technology Co., Ltd Site Map

Message Form