Weber Sensors 4320.81M/22 S141 Inline Flow Sensor, 22 mm Tube, Stainless Steel Housing, 24 VDC, 6-Pin Connector, 2 m Cable

Product Reference

• Manufacturer: Weber Sensors
• Part Number: 4320.81M/22 S141
• Product Type: Inline metering flow switch
• Compatible Medium: Water-based media
• Tube Diameter: 22 mm
• Operating Voltage: 24 VDC
• Electrical Connection: 6-pin connector with 2 m cable
• Condition: Brand new

Overview

The Weber Sensors 4320.81M/22 S141 Inline Flow Sensor is a compact metering flow switch designed for monitoring water-based media in industrial piping systems. It uses the calorimetric measuring principle to monitor flow without moving mechanical components in the sensing area.

This configuration features a 22 mm inline sensor tube, rugged stainless-steel housing, 24 VDC operating voltage, and a 6-pin electrical connector supplied with a 2 m cable. Separate range and set-point adjustments allow the sensor to be configured for the required flow-monitoring application.

Key Features

• Inline flow monitoring for water-based media
• Calorimetric operating principle
• Adjustable measuring range and switching set point
• Analog indication of the actual flow rate and adjusted set-point value
• LED indication of output status
• Relay output with potential-free changeover contact
• 22 mm stainless-steel inline sensor tube
• Rugged stainless-steel housing
• IP67 protection rating
• 24 VDC S141 electrical configuration
• 6-pin connector with 2 m cable

Technical Specifications

Manufacturer	Weber Sensors
Part Number	4320.81M/22 S141
Sensor Family	Inline flow-captor 4320.8xM
Medium	Water-based media
Measuring Principle	Calorimetric
Measuring Range	Continuously adjustable from 0–20 cm/s up to 0–300 cm/s
Set-Point Range	Approximately 15%–90% of the selected measuring-range setting
Tube Size	22 × 1.5 mm
Sensor-Tube Length	200 mm
Flow Rate at 300 cm/s	51.0 L/min for the 22 mm tube configuration
Maximum Pressure	30 bar
Medium Temperature	-20°C to 80°C
Ambient Temperature	-20°C to 70°C
Response Time	2–10 seconds, depending on the range setting
Linearity Deviation	Less than 5%
Repeatability	Less than 2%
Hysteresis	Approximately 10%
Electrical Output	Relay output with potential-free changeover contact
Operating Voltage	24 VDC
Electrical Connection	6-pin connector with 2 m cable
Protection Rating	IP67
Housing Material	Stainless steel, WN 1.4571 (AISI 316 Ti)
Sensor-Tube Material	Stainless steel, WN 1.4571 (AISI 316 Ti)
Housing Dimensions	66 mm outside diameter × 91 mm high

Operation

The sensor simultaneously monitors the flow rate and compares it with an adjustable switching set point. The analog display indicates the actual flow condition and the selected set-point value, while an LED provides visual indication of the output status.

Separate controls for the measuring range and switching set point allow the sensor to be adjusted to the operating conditions of the application.

Applications

• Cooling-water flow monitoring
• Industrial process-water systems
• Machine and equipment protection
• Low-flow condition detection
• Flow verification in water-based process lines
• Automated industrial control systems

What’s Included

• One Weber Sensors 4320.81M/22 S141 inline flow sensor
• One 2 m cable for the 6-pin connection

Installation Notes

Confirm the required tube size, supply voltage, wiring arrangement, flow range, medium compatibility, temperature, and system pressure before installation. This S141 version uses a configuration-specific 24 VDC connection and should be wired according to the documentation supplied with the sensor.

Frequently Asked Questions

What media can the 4320.81M/22 S141 monitor?
It is designed for monitoring water-based media.

What is the tube size?
This configuration has a 22 mm outside-diameter sensor tube with a 1.5 mm wall thickness.

What voltage does this S141 configuration require?
The 4320.81M/22 S141 is configured for 24 VDC operation.

Does the sensor provide a visual flow indication?
Yes. It has an analog display for the actual flow condition and adjusted set point, plus an LED output-status indicator.

What electrical connection is supplied?
This configuration has a 6-pin connector and includes a 2 m cable.

Can this sensor be used for oil-based media?
The 4320 version is specified for water-based media. Weber Sensors identifies the related 4321 series for oil-based media.