Kofloc CK SERIES Flow Setting Device

Description

The Kofloc Flow Setting Device MODEL CK SERIES is a high-precision, dial-type potentiometer designed to generate 0–5V DC command signals for controlling Kofloc mass flow controllers (MFCs). Featuring a 000–999 dial scale for 0–100% flow setting, it operates on 5VDC and offers a standard resistance of 10kΩ, providing high-accuracy setpoints for gas control systems.

These devices are generally used in laboratory and industrial settings for semiconductor manufacturing, gas analysis, and fuel cell testing.

The Kofloc CK Series is a specialized line of analog flow setting devices designed specifically to act as the “brain” or control interface for Mass Flow Controllers (MFCs). While much of the industry has moved toward digital RS-485 or DeviceNet interfaces, the CK Series remains a staple for laboratories and manual test benches where precision tactile control is preferred.

The CK Series functions as a precision potentiometer that generates a reference signal to tell an MFC exactly how much gas to allow through the line.

Specifications

Flow setting device for MFC.

Function: Generates 0–5V flow setpoint signals.
Accuracy: Full Scale (FS).
Resistance: (standard).
Input Voltage: 5VDC.
Dial Scale: 3-digit scale (000–999) for precision manual input.
Application: Primarily used with Kofloc MFC models 5100, 5400, and 3660 series.

Features

High Resolution: The 10-turn (or similar high-ratio) potentiometer allows you to dial in flow rates with extreme granularity. Because the scale is $000-999$, you can easily correlate the setting to a percentage of the MFC’s maximum flow (e.g., a setting of $500$ equals $50%$ of full scale).
Passive-Style Control: It does not require a complex computer interface. If you have a power supply and an MFC, the CK unit acts as the manual command center.
Reliability: In high-interference (EMI) environments where digital signals might flicker, these analog DC signals are remarkably stable.