Pressure Transimitter

Low Differential Pressure Transmitter/ Transducer

For measuring very small pressure differences between two measurement points either side of a ventilation fan, both sides of an air filter or either side of clean room wall.

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Model 168 Differential Pressure Transmitter

Differential pressure sensor/transmitter
Pressure medium: air or other non-conductive gas
Accuracy: ±1.0%,±0.4%,±0.25%
Range: unidirectional: 25 Pa to 25000 Pa/bidirectional: ±10 Pa to ±10000 Pa
Signal output: 4-20mA, 0-5Vdc, 0-10Vdc
Overload: Forward and reverse 15PSL (100KPa)


The core component of the Model 168 series differential pressure sensor/transmitter is a capacitive pressure sensor, which consists of a stainless steel diaphragm with a fixed electrode forming a capacitor whose value varies with pressure. Using the company's special patented technology carefully designed sensor sensors and unique detection circuit to ensure good temperature performance and long-term stability of the product.

The Model 168differential pressure sensor/transmitter can be used to measure differential or gauge pressure with outputs of 0-5V, 0-10V, 4-20mA, and can also be customized for other outputs. The accuracy of Model 168 was ±1.0%FS, 0.4%FS or 0.25%FS at room temperature. The temperature compensation ranges from 4 ℃ to 77℃, and the temperature effect is less than ±0.05%FS/℃.

Model 168 has excellent performance-price ratio, widely used in HVAC, environmental pollution control, clean engineering, medical instruments and equipment, oven pressurization and furnace pressure control, natural gas, gas pipe network monitoring, underground ventilation and power plant wind pressure monitoring and other fields.


 The positive/negative pressure end can withstand at least 100kPa 

    overload without damage

 With temperature compensation capacitive sensitive element, to 

    ensure the transmitter excellent movement State/static temperature


 Multiple pressure interfaces/output forms/installation modes are 


 True zero output of voltage

 Asymmetrical bidirectional differential pressure range is optional

 Full protection of misconnection

 Meet the CE standard

 Environmental protection design, in line with ROHS standards

 Minimum pressure range of 10Pa


ParameterStandardSpecial selectionSpecial selection
Accuracy RSS*(under constant temperature)±1.0%FS±0.40%FS±0.25%FS

nonlinearity(best fitting line)

Temperature effect
Zero point/Full range offset(/℃)±0.05%FS±0.03%FS±0.02%FS
Compensation range4℃ to 77℃
Maximum static pressure15PSI(100kPa) 
OverloadBoth positive and negative are 15PSI(100kPa)
Stability ratio±0.5% FS/YR
Preheat5 seconds to reach the performance specification
Installation position effectWhen factory calibration, the sensor is placed vertically. In order to ensure accuracy, necessary fine tuning should be made when installing other positions at zero point

Environmental and mechanical parameters
Operating temperature-18℃ to 77℃
Storage temperature-40℃ to 85℃
Electrical connectionPluggable terminal with PG-9 or PG-7 cable locking device
Pressure connection3/16"、φ8、φ6.5 brass tower pressure connection(optional)
Output regulation
remove the terminal cover to fine-tune zero/full range
Pressure mediumAir or other non-conductive gas
ShellDie cast aluminum (RoHS standard)
InstallationThe installation size is shown in the attached figure 1. Two 4.2mm diameter mounting holes in the shell are provided with two M3 X 6 mounting screws. There are other options for installing the bottom plate.

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SENBA Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality photoelectric components, such as PIR sensors, Photoresistors,Light Sensors, Flame detectors etc. Our strategic goal is to master the core technology.