Flow Alarm Switch: Ensuring System Safety and Efficiency

Flow Alarm Switch, also known as a flow switch or flow sensor, is a device designed to monitor the flow rate of liquid or gas within a system and trigger an alarm or switch off the system when the flow deviates from preset limits. It is an essential component in many industrial and commercial applications where the regulation of fluid flow is critical to the safety, efficiency, and effectiveness of operations.

The device typically consists of a sensor that detects the flow rate and a control unit that compares this rate to predefined thresholds. If the flow rate is too low or too high, indicating a potential problem such as a leak, blockage, or pump failure, the control unit activates an alarm, shuts down the system, or performs another predefined action to alert operators or prevent damage.

Specifications
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Specification

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Overview

The bistable switch can meet various requirements. This switch is stuck on the dovetail rail of the measuring tube, and the flow value can be set. It is easy to install, reliable, and can be easily added to existing equipment.

Applications and Functions

SW650 Upper Limit. When the magnetic float is in the setting position of the alarm switch, the contact is closed. When the magnetic float is higher than the alarm switch setting position, the contact remains closed. When the magnetic float is lower than the setting position of the alarm switch, the contact is disconnected.
SW651 Lower Limit. When the magnetic float is in the setting position of the alarm switch, the contact is closed. When the magnetic float is lower than the alarm switch setting position, the contact remains closed. When the magnetic float is higher than the alarm switch setting position, the contact is opened.

Table 1: Relevant Parameters
Working Voltage:	Umax = 220 V AC	Forward resistance: <200 mΩ
Working Voltage:	Umax = 24 V DC	Insulation resistance: >10⁹ mΩ
Working Current:	Imm = 0.5 A	Working temperature: 0 °C to 55 °C
Working Current:	Lmm = 0.1 A	Protection level: IP 65
Working Power:	Pmax = 10 VA	Delay distance: 4 mm
Working Power:	Pmax = 1 VA	Size: 42×23×45 mm