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Compact Differential Pressure Transmitter – PN51

PREV: Digital Display Pressure Transmitter Controller – PN53E

Product introduction

The PN51 series compact differential pressure transmitter consists of a dual-isolated differential pressure sensor and an integrated amplifier circuit, offering high stability and excellent dynamic measurement performance. It is equipped with a high-performance microprocessor that performs non-linear and temperature drift compensation on the sensor, enabling accurate digital data transmission, field device diagnostics, and remote bidirectional communication. This makes it suitable for the measurement and control of liquids and gases.

With a wide range of selectable measurement ranges, the PN51 transmitter can meet the diverse needs of users and is widely used in metallurgy, machinery, petroleum, chemical engineering, power plants, light industry, food, environmental protection, national defense, and scientific research.

Working Principle:
The pressure from the process is applied to the sensor, which outputs a voltage signal proportional to the pressure. This signal is amplified and converted into a standard 4–20mA current signal. The transmitter includes a power supply protection circuit and a precise temperature compensation circuit to ensure stable operation.

Technical Specifications Wiring Diagram Dimension Drawing Model Selection Guide Precautions

Measuring Range	0...0.2 bar to 0...35 bar
Accuracy	±0.5%
Power Supply	24VDC(10-30)VDC
Output Signal	4-20mA DC
Long-Term Stability	≤ ±0.2% F.S/year
Overload Pressure	≤ 3x rated pressure
Operating Temperature	（-20～80） ℃
Interface Size	Customizable

PN51-	...	A	G4	H	1	Detailed Description
PN51-						PN51 Series Compact Differential Pressure Transmitter
	...					Measuring Range: 0...0.2 bar to 0...35 bar (customizable by user)
		A				Output: 4-20mA
		B				Output: 0-5V
		C				Output: 1-5V
		D				Output: 0-10V
			G4			Thread Interface: G1/4
			G2			Thread Interface: G1/2
			N4			Thread Interface: NPT1/4
				H		External Thread Connection
				K		Internal Thread Connection
					1	Hirschmann Connector
					2	M12*1 Connector
Note: The selection table is for parameter configuration only. Final product is manufactured based on the selected code.

The transmitter is compact and lightweight and can be installed directly at the measurement point. Ensure the sealing of pressure ports to prevent air leakage that may affect accuracy.

Proper wiring as per specifications will allow the transmitter to function immediately. For high-accuracy applications, allow the device to warm up for 30 minutes before use.

It is recommended to install a two-way valve at the measuring point to prevent excessive static pressure on either side of the transmitter.

Only use the transmitter with gases or liquids that are non-corrosive to the 316L stainless steel diaphragm.

Follow the wiring instructions strictly to ensure proper operation.

In environments with strong electromagnetic interference or high performance requirements, use shielded cables.

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.