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Miniature Oval Gear Flow Sensor – SN55B

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Product introduction

Product Application:
The SN55B gear flow sensor is widely used for precise low-flow measurement in various industries.

Applicable Media:
Additives, fuels, flotation tanks in water treatment, corrosion inhibitors, catalysts, emulsifiers, oil, grease, fragrances, adhesives, solvents, ink, pesticides, and some high-viscosity fluids.

Application Industries:
Automotive, aerospace, mining, power, chemical, pharmaceutical, food, coatings, petroleum, environmental protection, printing, and more.
Especially suitable for flow measurement of high-viscosity media such as heavy oil, polyvinyl alcohol, resin (can measure fluids with viscosity up to 10,000 Pa·s).
Compact and lightweight, with low vibration and noise during operation, stable performance, and capable of measuring micro-flow in small-diameter pipes.
Low starting flow, wide turndown ratio, suitable for metering liquids with large fluctuations, high accuracy unaffected by pressure or flow changes, stable performance, long lifespan, and high flow capacity.
Measurement of resin and glue
Measurement of hydraulic oil, lubricating oil, and grease
Fuel oil measurement
Measurement of liquid nitrogen, refrigerants, solvents
Measurement of edible oil, fish oil, and food filling
Chemical and anti-corrosion fluid measurement
Fluid dosing control systems
Medium temperature: -30...80℃ (high-temp customization: 150℃)
Standard pressure resistance: 5 MPa
High-pressure customization: 40 MPa (stainless steel material)

Principle and Features Wiring Diagram Dimension Drawing Selection Table

The SN55B miniature gear flow sensor features built-in dual oval gears. When fluid enters the measuring chamber, it drives the gears to rotate. The volume of liquid captured between each tooth and the chamber wall is equal.
By detecting the number of gear teeth that pass through with a specific sensor, the volume of the flowing liquid can be determined.
The SN55B gear flow sensor is not affected by the viscosity of the medium and offers high measurement accuracy and repeatability, even at the upper and lower limits of the range. It is particularly suitable for measuring high-viscosity media.

Pulse output
High pressure resistance (1.0–45 MPa)
Capable of measuring various viscous media
High accuracy and high repeatability
Wide turndown ratio (1:100)
Broad measurement range
Strong corrosion and contamination resistance (acid/alkali)

Signal	Pin
Power +	1
Pulse	3

SN55B-	B	A2	P	X	B	Description
SN55B-						SN55B Series Miniature Oval Gear Flow Sensor
	A					Connector
	B					Hirschmann
	C					Compact type (4–20 mA output only, 1–5 V output not available)
	E					No LED display
		A1				Flow Range (corresponding thread): 0.003–0.8 L/min (G1/8 internal thread)
		A2				Flow Range (corresponding thread): 0.003–2 L/min (G1/4 internal thread)
		A5				Flow Range (corresponding thread): 0.004–4 L/min (G1/4 internal thread)
		A8				Flow Range (corresponding thread): 0.1–10 L/min (G1/4 internal thread)
		A8.1				Flow Range (corresponding thread): 0.01–10 L/min (G1/4 internal thread)
		A9				Flow Range (corresponding thread): 0.2–20 L/min (G1/2 internal thread)
		A9.1				Flow Range (corresponding thread): 0.02–18 L/min (G3/8 internal thread)
		A10				Flow Range (corresponding thread): 0.03–20 L/min (G1/2 internal thread)
		A15				Flow Range (corresponding thread): 0.8–80 L/min (G3/4 internal thread)
		A15.1				Flow Range (corresponding thread): 0.05–80 L/min (G3/4 internal thread)
		A20				Flow Range (corresponding thread): 0.1–120 L/min (G1 internal thread)
		A25				Flow Range (corresponding thread): 1–250 L/min (G1-1/4 internal thread)
		A30				Flow Range (corresponding thread): 2–380 L/min (G1-1/2 internal thread)
			P			PNP pulse output
			N			NPN pulse output
			4			4–20 mA output
			1			1–5 V output
				L		Body Material: Alumina
				X		Body Material: 304 Stainless Steel
				P		Body Material: PP
					B	Standard version
					T	High-temperature customization
					P	High-pressure customization
The selection table is for parameter selection only. Final product is manufactured based on code corresponding to selected parameters.

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.