Differential Pressure Sensors

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Liquid Differential Pressure Sensor, 4-20mA

SISCO-DPS-CYYZ3051SA

The liquid differential pressure sensor is designed for accurate differential pressure measurement of liquid media in industrial environments. It supports 4-20mA HART protocol communication for convenient data transmission and system integration. With low power consumption (≤0.02Us W) and a rapid 20ms response time.

$965.23

Differential Pressure Transmitter for Liquid/Gas

SISCO-DPS-CYYZ106

The differential pressure transmitter for liquid/gas provides stable pressure monitoring with a 0.5%FS measurement accuracy and excellent long-term stability of ±0.1%FS/year. Designed for harsh industrial applications, it supports media temperatures from -40~85℃, features an IP66 protection rating, and uses a corrosion-resistant 316L stainless steel diaphragm for extended service life.

$402.31

Differential Air Pressure Sensor, Wall-mounted/Embedded

SISCO-DPS-CCY81

The differential air pressure sensor is a high-precision sensor designed for measuring differential pressure of air and neutral gases. With a 0~10kPa range, RS485 digital output, and 0.5%FS accuracy, it provides reliable data for HVAC systems, cleanrooms, ventilation equipment, and industrial automation. The IP65-rated housing supports stable operation in various installation environments.

$143.58

High Accuracy Differential Pressure Transducer

SISCO-DPS-MIK-3051

The high-accuracy differential pressure transducer combines accurate measurement with stable signal output for industrial applications. It supports a 0~1.3~7.5 kPa range, 0.5% basic error, and 0.01% sensitivity change when the lower limit and range are adjusted. The two-wire 4-20mA output makes it easy to connect with control and monitoring equipment.

$589.62

Digital Differential Pressure Sensor, LCD Display

SISCO-DPS-GPT250

Digital differential pressure sensor provides reliable pressure measurement across a wide 0~5 kPa to 5 MPa range with accuracy options of ±0.5%FS or ±0.25%FS. With 4-20mA, 1-5V, 0-5V, and 0-10V outputs, it can be easily integrated into different industrial monitoring and control systems. The IP65 protection rating supports reliable operation in demanding environments.

$289.15

Wireless Differential Air Pressure Sensor

SISCO-DPS-GPT244

The wireless differential air pressure sensor with ±0.5%FS accuracy. Featuring a 304/316/316L stainless steel probe, IP65 protection, and a built-in 3.6V 7000 mAh lithium battery, it delivers reliable wireless monitoring for industrial applications.

$1,727.62

Explosion Proof Differential Pressure Sensor for Gas

SISCO-DPS-CCY30

Explosion proof differential pressure sensor is an industrial sensor for measuring the pressure difference of gas and providing electrical pressure signals to monitoring or control systems. It supports a -100kPa to 100kPa range, 0.5%FS accuracy, multiple analog and digital outputs, and IP65 protection for industrial applications.

$178.69

Micro Differential Pressure Sensor

SISCO-DPS-CCY11

Our micro differential pressure sensor is a compact pressure measurement device for monitoring the pressure difference of gas. It supports a -100 to 100kPa range, offers up to 0.25%FS accuracy, provides 0.02%FS analog resolution, and operates with gas media from -40°C to 100°C.

$178.69

Fuel Differential Pressure Sensor, HART

SISCO-DPS-OHR-3051F1

Fuel differential pressure sensor measures pressure differences in fuel and process systems while providing real-time readings through its smart display head. HART protocol enables digital communication, while the sensor offers ±0.075% accuracy, 4–20mA output, and a wide 0–1.5kPa to 4MPa range.

$618.96

Capacitive Differential Pressure Transducer

SISCO-DPS-HK-DP3851

The capacitive differential pressure transducer is designed for accurate measurement of liquid, gas, and steam. It offers ±0.075% to ±0.1% accuracy, 4–20 mA DC output, two-wire transmission, and IP65 protection for dependable industrial operation.

$394.46

Water Differential Pressure Sensor

SISCO-DPS-CCY17

The water differential pressure sensor provides accurate measurement of pressure differences in water systems and other compatible media. It offers a 0–2.5 MPa range, 0.25% FS accuracy, and 20 ms response time for fast pressure monitoring. With operation from -40 to 85°C and IP65 protection, fits a wide range of industrial applications.

$324.62

Differential pressure sensors measure the difference in pressure between two points and convert it into an electrical signal for monitoring, control, or data acquisition. They are widely used for measuring liquid, gas, and air pressure differences in HVAC systems, pipelines, filters, pumps, tanks, and industrial processes. Available output options include 4-20mA, 0-10V, RS485, and other standard signals.

How Does a Differential Pressure Sensor Work?

A differential pressure sensor measures the pressure difference between two separate pressure ports.

The two pressure inputs are commonly identified as:

P1 / High Pressure: Higher pressure input
P2 / Low Pressure: Lower pressure input

The differential pressure sensor detects the pressure difference between the two ports:

ΔP = P1 − P2

The sensing element responds to this pressure difference and converts the mechanical change into an electrical signal. The signal can then be transmitted to a display, PLC, controller, data acquisition system, or other monitoring equipment.

Differential Pressure Sensor Output Signals

The output signal should match the input requirements of the connected controller, meter, or data acquisition system.

4-20mA Differential Pressure Sensor

4-20mA is one of the most widely used analog signals in industrial automation.

It is commonly used for:

PLC integration
DCS systems
SCADA monitoring
Remote pressure measurement
Industrial control systems

The current signal represents the measured differential pressure within the sensor's configured measurement range.

0-10V Differential Pressure Sensor

A 0-10V output provides an analog voltage proportional to the measured pressure difference.

It is commonly used with controllers and building automation equipment, especially in HVAC and environmental control applications.

0-5V Differential Pressure Sensor

0-5V output can be used with compatible electronic controllers, data acquisition systems, and measurement equipment that require a lower analog voltage range.

RS485 Differential Pressure Sensor

RS485 provides a digital communication interface that can be used to connect the sensor to industrial monitoring and control equipment.

It is useful when digital communication is preferred over an analog signal.

Modbus Differential Pressure Sensor

When an RS485 sensor supports Modbus RTU, differential pressure data can be transmitted digitally to compatible PLCs, HMIs, computers, and monitoring systems.

This can simplify integration into larger industrial communication networks.

Differential Pressure Sensor vs Pressure Sensor

Although both differential pressure sensors and pressure sensors measure pressure-related parameters, they are designed for different measurement configurations.

Feature	Differential Pressure Sensor	Pressure Sensor
Measurement	Difference between two pressures	Pressure at one measurement point
Pressure ports	Typically two	Typically one
Measurement formula	ΔP = P1 − P2	Gauge, absolute, or other reference
Filter monitoring	Suitable	Generally not sufficient by itself
HVAC pressure difference	Suitable	Not the typical choice
Pipeline pressure	Suitable for pressure difference	Suitable for point pressure
Tank level measurement	Can be used indirectly	Can also be used depending on configuration

A differential pressure sensor is the appropriate choice when the application requires comparison between two pressure points.

Differential Pressure Sensors Selection Table

Model	Measured Medium	Range	Output / Communication	Accuracy
SISCO-DPS-CYYZ3051SA	Liquid (compatible with contact material)	-500kPa~1MPa	4-20mA	±0.2% FS, ±0.5%FS
SISCO-DPS-CYYZ106	Liquid / Gas (compatible with contact material)	0~2.5MPa	Wireless	0.5%FS
SISCO-DPS-CCY81	Air and neutral gas (compatible with contact material)	0~10kPa	RS485	0.5%FS or 0.25%FS (range ≥1kPa); 1%FS or 0.5%FS (range <1kPa)
SISCO-DPS-MIK-3051	Gas, liquid, steam	0~1.3~7.5kPa	4-20mA	0.5%FS
SISCO-DPS-GPT250	Wind pressure and flow velocity measurement	0~5kPa~5MPa	4-20mA, 1-5V, 0-5V, 0-10V	±0.5%FS, ±0.25%FS
SISCO-DPS-GPT244	Liquid / Gas	0～2000KPa	Wireless	±0.5%FS
SISCO-DPS-CCY30	Gas (compatible with wetted materials)	-100kPa～0～100kPa	4～20mA, RS485, 0～5VDC, 0～10VDC, 1～5VDC	0.5%FS or 0.25%FS (Range ≥1kPa); 1%FS or 0.5%FS (Range ＜1kPa)
SISCO-DPS-CCY11	Gas (compatible with wetted materials)	-100～0～100kPa	Current output, RS485, Voltage output	0.25%FS, 0.5%FS, 1%FS
SISCO-DPS-OHR-3051F1	Gas, liquid, steam (universal)	0~1.5kPa~4MPa	HART	±0.075%
SISCO-DPS-HK-DP3851	Liquid, Gas, Steam	10000 (kPa)	4-20mA	±0.075% ~ ±0.1%
SISCO-DPS-CCY17	Liquid or gas (compatible with wetted materials)	0 ~ 2.5MPa	4 ~ 20mA, RS485, 0 ~ 10VDC, 0 ~ 5VDC, 1 ~ 5VDC, 0.5 ~ 2.5VDC	0.25% FS, 0.5% FS