IFM Su7/Su8/Su9 Series Flow Sensor

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2025/7/4 Update

Inline ultrasonic flow sensor for measuring water, ethylene glycol, and oil｜DC Configurable flow and temperature output up to 200 liters per minute
— SU ultrasonic flow sensors are specially designed to simultaneously monitor the flow, fluid temperature, and totalizer functions in various flow applications. With a compact design, they are suitable for small diameter (1″ or smaller) pipes.

IFM Su7/Su8/Su9 Series Flow Sensor

Technical Features

Simultaneous monitoring of flow rate, fluid temperature, and totalized flow.

Monitors water, ethylene glycol, and oil up to 200 liters per minute.

Integrated display with setting buttons.

Uses ultrasonic sensing principle, no moving parts.

Optional switch, totalizer, and pulse outputs.

Products + Accessories Selection:

Measuring range (flow)	Output 1	Output 2	Measuring range (temperature)	Supported display units	Order no.
0…50 l/min	PNP / NPN switch or pulse (flow)	PNP / NPN switch / 4…20 mA / 0…10V adjustable analog (flow or temperature)	-10…80 °C	lpm, m³/h, L, °C	SU7000
0…100 l/min					SU8000
0…200 l/min					SU9000
0…200 l/min	4…20 mA adjustable analog (temperature)	4…20 mA adjustable analog (flow)	-10…80 °C	lpm, m³/h, gpm, gph, °C, °F	SU9004

Connecting Cables And Optional Accessories

Type	Description	Order no.
	SU mounting bracket	E40166

Type	Description	Order No.
	M12 Micro DC (4-pin) 2 m, PUR	EVC001
M12 Micro DC (4-pin) 5 m, PUR	EVC002
M12 Micro DC (4-pin) 10 m, PUR	EVC003
	M12 Micro DC (4-pin) 2 m, PUR	EVC004
M12 Micro DC (4-pin) 5 m, PUR	EVC005
M12 Micro DC (4-pin) 10 m, PUR	EVC006

Required accessories (2 adapters per pack)

Description	Applicable Model	Order No.
G 3/4 adapter	SU7	E40216
G 1 adapter	SU8	E40217
G 1 1/4 adapter	SU9	E40205

Adapter material: 316 stainless steel

Specifications:

Power supply voltage: 19…30 VDC
Maximum load current: 2 x 250 mA
Accuracy (flow):
- SU7, SU8, SU9: ±3% of reading + 0.2% of full scale (water)
- SU7 and SU8: ±5% of reading + 0.5% of full scale (oil and ethylene glycol)
- SU9: ±8% of reading + 0.5% of full scale (oil and ethylene glycol)
Repeat accuracy (flow):
- SU7, SU8: 0.2% of full scale
- SU9: 0.5% of full scale
Response time (flow): < 0.25 sec
Load resistance of analog output: 4…20 mA; max. 500Ω / 0…10V: min. 2,000Ω
Pressure rating: 16 bar
Wetted parts: Stainless steel (316L); FKM; PES (Ultrason 2010); Centellen 200
Protection class: IP67

What’s More:

SU Ultrasonic Flow Sensor – Working Principle

Direct Field Mount 5 — Ultrasonic technology is based on the differential transit time principle. Sound pulses are sent in the direction of the fluid flow and detected in the opposite direction using piezoelectric ceramic sound transducers. The flow rate is calculated based on the difference in transit times.

Benefits Introduce In Detail

Ifm’s inline flow sensors provide accurate feedback for your critical flow applications

SU ultrasonic flow sensors are specially designed to simultaneously monitor the flow, fluid temperature, and totalizer functions in various flow applications. With a compact design, they are suitable for small diameter (1″ or smaller) pipes.

The flow sensor provides a 4-digit numeric display that can show liquid flow (gal/min or l/min), totalized flow (gallons or liters), and medium temperature (°F or °C). Setpoints are configured via simple button settings. The flow sensor can be programmed to provide switch outputs (flow and/or temperature), a pulse output (totalized flow), or an analog output (flow or temperature).

Dosing applications

The ultrasonic flow sensor can calculate the total liquid volume in cubic meters or liters. In addition to the totalizer display, the flow sensor can also provide a pulse output per liter.