Kofloc Model RK1970/RK1975/RK1976 Reed Switch Flowmeters(for Alarm Switches)

Description

The Kofloc Model RK1970/RK1975/RK1976 series is engineered for simplicity and durability. Unlike the photosensor models, which require an infrared beam, the reed switch models contain a powerful permanent magnet within the float. As the float reaches a user-defined set point, the magnetic field closes (or opens) a reed switch mounted to the exterior of the flow tube.

This series is divided by valve configuration to suit different system architectures:

RK1970: Standard flowmeter without a control valve, used for pure monitoring and alarm signaling.
RK1975: Equipped with a needle valve at the bottom (inlet) for standard pressure control.
RK1976: Equipped with a needle valve at the top (outlet), ideal for vacuum applications or backpressure-sensitive lines.

Because the reed switch is a passive component, it is highly resistant to ambient light interference—a common issue with optical sensors—making it perfect for outdoor or brightly lit industrial environments. The switch position is easily adjustable along the length of the tube, allowing for quick field calibration of high or low flow alarms.

Brand

Kofloc

The natural environment is preserved through the balance of solids, liquids and gases that exist on the earth. However, human civilization has caused pollution that has greatly damaged our environment. The task of the present generation is to restore our environment to its natural healthy state. And this is also the greatest challenge for 21st century science and technology.

KOFLOC's corporate motto is "A Scientific Approach for Fluids." In other words, we create products that scientifically measure and control the balance of liquids and gases. We trust that through our work we are making a contribution to the regeneration of the environment and to the establishment of a prosperous society.

Features

Magnetic Reed Switch Alarm: Non-contact switching triggered by a magnetic float.
No Power Required for Sensor: The reed switch operates purely on magnetic force (though the connected alarm circuit will require power).
Adjustable Alarm Points: The switch can be positioned anywhere along the scale for high or low limit detection.
High-Contrast Visibility: Clear glass tube and bright float ensure easy visual verification from a distance.
Versatile Valve Options: Choice of inlet, outlet, or no valve to match process requirements.
Reliable in Harsh Lighting: Immune to ambient light interference compared to optical sensors.

Specification

Models: RK1970 (No Valve), RK1975 (Inlet Valve), RK1976 (Outlet Valve).
Switch Type: Reed Switch (SPST standard, N.O. or N.C. depending on float position).
Contact Rating: Typically 10VA AC / 10W DC (Check specific model for amperage limits).
Accuracy: Within ±5% Full Scale.
Max Operating Pressure: 0.5 MPa to 0.7 MPa.
Operating Temperature: 0°C to 60°C.
Wetted Materials: Stainless Steel (SUS304/316), Glass, and Viton/NBR seals.
Connection Size: Rc 1/4 or Rc 3/8.

Applications

The Kofloc Model RK1970/RK1975/RK1976 Reed Switch Flowmeters are widely used for:

Cooling Water Monitoring: Protecting induction heaters, lasers, and welding machines from overheating.
Lubrication Systems: Sending an alarm if oil flow to critical bearings drops.
Gas Injection: Monitoring inert gas flow in heat treatment furnaces.
Pump Protection: Detecting dry-run conditions or blocked discharge lines.
Wastewater Treatment: Simple automated control for chemical dosing lines.