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Micro Differential Pressure Transmitter – PN53

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Product introduction

The PN53 series micro differential pressure transmitter adopts a thermal-type low-pressure sensor core. It utilizes a micro-flow channel integrated into the sensor chip to detect airflow changes and determine air pressure.

PN53 features strong overload capacity, excellent electromagnetic interference resistance, wide measuring range, and multiple signal outputs. It is widely used for measuring air or neutral gases in systems such as HVAC, process control, environmental monitoring, clean rooms, and other applications requiring micro differential pressure detection.

Technical Specifications Dimension Drawing Selection Guide Altitude Effect on Product Accuracy

Sensor Core: Imported thermal low-pressure sensor core with sensitive pressure response

Stability & Repeatability: High stability, excellent repeatability
Installation: Easy to install, insensitive to installation orientation
EMI Resistance: High immunity to electrical interference; optional isolated output

Working Medium①	Air or neutral gases
Measurement Range	±25Pa, ± 50Pa, ± 100Pa
Overload Pressure	2Bar
Accuracy	±25Pa±1Pa
	± 50Pa±1%F.S
	± 100Pa±0.5%F.S
Operating Temperature	-20℃ ~70℃
Storage Temperature	-40℃ ~80℃
Temperature Drift	0.03%FS/℃
Ingress Protection	IP65
Electrical Connection	4-wire	6-wire
Output Signal	RS-485	4~20mA/0~10VDC
Metal barbed fitting, Ø6.2 mm	9-30VDC/24VAC±20%	12-30VDC/24VAC±20%
Pressure Port	Metal barbed fitting, Ø6.2 mm
Communication	RS-485 standard interface, Modbus RTU protocol
Certifications	RoHS compliant, CE certified (EU)
EMC Compliance	EN61326-1
Measurement media include air, oxygen (O₂), nitrogen (N₂), argon (Ar), and carbon dioxide (CO₂). For other gases, please contact the supplier. When using AC power for RS485 output (non-isolated version), isolated 24VAC power is required.

PN53-	1	N	A	Detailed
PN53-				PN53 Series Micro Differential Pressure Transmitter
	1			-25 ～25Pa
	2			-50 ～50Pa
	3			-100～ 100Pa
		N		Without display
		O		With display
			A	4-20mA and 0-10VDC (simultaneous output)
			E	RS-485 communication
			E1	RS-485 with isolation
Note: The selection guide is for parameter selection only. Final product configuration is defined by corresponding factory code.

The pressure sensing core is calibrated at a reference absolute pressure of 1Bar (100,000Pa). As the sensor uses a thermal principle, altitude/atmospheric pressure variations affect output. Use the following formula to compensate:
ΔPeff = ΔPsensor × (100,000Pa / Pabs)
Where:
ΔPeff = compensated micro pressure difference
ΔPsensor = current output from the sensor
Pabs = absolute pressure at installation location (i.e., local atmospheric pressure in Pa)

Shanghai Kayuan Electronic
Technology Co., Ltd.

Shanghai Kayuan Electronic Technology Co.,Ltd is an enterprise specializing in the production and R & D of industrial sensors and controllers. Its main products include switches and sensors for flow, pressure, temperature, and liquid level.

In 2008, our assembly plant was established in Shanghai China,PAKU INTELLIGENT EQUIPMENT(SHANGHAI)CO.,LTD a subsidiary of Kayuan to produce the PAKU series of products. We adopt advanced technology and manufacturing processes across the board. With our professional design and production technology, comprehensive product lines, excellent quality, and sales network services, we can not only provide users with timely and professional technical support but also offer high - quality one - stop services.

The company has set up various departments such as the purchasing department, R & D department, quality management department, finance department, sales department, after - sales department, general office, laboratory, archive room, calibration workshop, production workshop, inspection area, storage area, shipping area, and tea break rooms, aiming to provide products of excellent quality and sincere services.

We adhere to the customer - centric concept of creating value for customers. According to the industry needs of customers, we continuously update technology and optimize services, aiming to become a leader in the field of process automation.

PAKU products are now widely used in different industries, including automation complete sets of equipment, petroleum equipment, chemical equipment, power equipment, welding equipment, steel equipment, metallurgical equipment, automobiles, and water treatment. We have served many customers at home and abroad, and our products are sold to countries such as Canada, the United States, Brazil, Indonesia, Vietnam, Thailand, and Russia.

In the increasingly competitive global market in the future, PAKU will, as always, serve a wide range of domestic and foreign customers with excellent quality, reasonable and competitive prices, on-time delivery, and perfect after-sales service. We welcome extensive cooperation with OEM and ODM customers.