The Husman joint rod pressure transmitter is introduced to meet the requirements of some fields in the market with low measurement and control accuracy, but high cost control. Using diffusion silicon sensing elements produced by enterprises, mainly measuring pressure of water, air, etc. Its accuracy, especially its long-term stability and lifespan, are significantly higher than those of ceramic piezoresistive and strain gauge pressure transmitters, making it widely used and in high demand in the market. Mainly used in automatic control and detection scenarios, it is used to replace low-grade instruments such as ceramic pressure resistors, strain gauges, and pressure gauges.
Pressure sensors are generally composed of elastic sensitive elements and displacement sensitive elements. The function of elastic sensitive elements is to apply the measured pressure on a certain area and convert it into displacement or strain, which is then converted into an electrical signal related to the pressure by the displacement sensitive element or strain gauge. It is also possible to integrate the functions of these two elements. Husman joint rod pressure transmitters are widely used in various industrial automation environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil well, power, shipbuilding, machine tools, pipelines and many other automation industries.
The Husman joint pressure transmitter can meet the volume requirements of most miniaturized devices, is lightweight, easy to install, and can have multiple interfaces and signal output methods to choose from. It is a relatively universal pressure measuring device that can be used for pressure measurement of non corrosive media such as liquids and gases in automated equipment made of 316L material. We can also customize products made of polytetrafluoroethylene material or use special materials for anti-corrosion treatment according to customer needs.
Technical Specifications

Range Kpa -100 to 0, 5, 100, 500, 800, 1000
Mpa -0.1～0、1、10……120
Pressure forms: gauge pressure, absolute pressure
Output signal 4-20mA two-wire system or 0-5V, 0-10V, 1-5V three wire system
Accuracy 0.25% FS 0.5% FS
Nonlinear<0.25% FS<0.5% FS
Delay<0.25% FS<0.5% FS
Repeatability<0.25% FS<0.5% FS
Zero drift<0.1% FS<0.2% FS
Temperature drift<0.01% FS<0.02% FS
Stability (year) ＜ 0.2% FS ＜ 0.25% FS
Working voltage 12-36V DC (calibration: 24V DC)
Working temperature -10~65 ℃
Overload capacity 200%
Lifespan greater than 90 million cycles (25 ℃)
Load resistance ＜ 750 Ω
Response time<1ms
Various media compatible with 316L for measuring media
Membrane material 316L/ceramic membrane
Shell material 1Cr18Ni9Ti
Interface M20 * 1.5 or 1/2NPT or 1/4NPT or user-defined
Explosion proof grade ExibIICT6
Protection level IP65

Fault Analysis
1. The pressure has increased, but the output of the sensor cannot go up: In this case, the pressure interface should be checked for air leakage or blockage first. If it is confirmed that it is not, the wiring method and power supply should be checked. If the power supply is normal, simple pressurization should be carried out to see if the output changes, or check if the sensor zero position has output. If there is no change, the sensor is damaged, which may be due to instrument damage or other problems in the entire system; 2. If the output of the pressure sensor does not change when pressurized, and then the output of the pressure sensor suddenly changes, and the zero position of the pressure relief sensor cannot return, it is likely to be a problem with the sealing ring of the pressure sensor. It is common that due to the specifications of the sealing ring, after tightening the sensor, the sealing ring is compressed into the sensor pressure port and blocks the sensor. When pressurized, the pressure medium cannot enter, but when the pressure is high, the sealing ring suddenly opens, causing the pressure sensor to change under pressure. The best way to troubleshoot this issue is to remove the sensor and directly check if the zero position is normal. If the zero position is normal, replace the sealing ring and try again; 3. Unstable output signal of transmitter: This fault may be caused by the pressure source itself, which is an unstable pressure. It is very likely that the sensor's sensing part fluctuates due to the strong vibration of the pressure sensor itself; 4. The deviation between the transmitter and the pointer pressure gauge is large. Deviation is a normal phenomenon, and confirming the normal range of deviation is sufficient; 5. A common fault is the influence of the installation position of the differential pressure transmitter on the zero position output. Micro differential pressure sensors have a small measurement range, and the sensing elements in the sensor can affect the output of the micro differential pressure sensor. During installation, the axial direction of the pressure sensitive part of the sensor shall be perpendicular to the gravity direction. After installation and fixation, adjust the zero position of the transmitter to the standard value.