Kofloc Mass Flow Controllers Model CR-400B

Description

The Kofloc Model CR-400B serves as the “command center” for your mass flow instruments. In many laboratory and R&D environments, integrating an MFC into a system can be a challenge due to the requirement for dual-polarity power supplies and specific signal voltages. The CR-400B solves this by providing an all-in-one plug-and-play interface. The unit features a bright, 4-digit LED display that shows either the flow set-point or the actual flow rate from the connected device. Users can adjust the flow via a high-precision multi-turn potentiometer on the front panel, allowing for granular control of the gas stream. Additionally, the CR-400B includes programmable alarm outputs (High/Low) and a scaling function, ensuring that the display matches the full-scale range of any connected Kofloc 3000, 8000, or HFC series model. Its compact, half-rack size makes it ideal for benchtop use or integration into a control cabinet via optional mounting brackets.

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.

Specifications

Control function flow setting, forced valve open/close operation and zero cut
Flow rate input / output signal 0 to 5VDC
Power output ±15VDC (300mA)
Display 4-digit 7-segment LED (4 digits for instantaneous flow rate, 8 digits for integrated flow rate (upper and lower 4 digits shown alternately)
Display accuracy Instantaneous flow rate : within ±0.1%F.S., ±1 digit
Electrical connection D-sub 9 pins, female (on MF main body side) D-sub half pitch, 20 pins, female (external control)
Digital communication RS485
Power consumption Approx. 25W
Input voltage (frequency) 85 to 264VAC (48 to 440Hz)
Power cable Approx. 3m
Weight Approx. 400g

Features

High-Visibility Display: 4-digit LED shows instantaneous flow rate or set-point percentage.
Precision Setting Dial: Multi-turn potentiometer for ultra-fine manual flow adjustments.
Dual Alarm System: Includes upper and lower limit alarm relays for process safety and automation.
Versatile Compatibility: Works seamlessly with Kofloc 3100, 3200, 3660, 8700, and HFC-303 series.

Applications

Benchtop Research: Providing a simple, manual control station for gas experiments.
Instrument Calibration: Serving as a stable power source and readout for verifying flow sensors.
Pilot Plant Gas Dosing: Local control of reagent gases in chemical reactor setups.
Atmosphere Control: Managing gas flows in small furnaces or environmental chambers.
OEM Integration: Providing a standardized display module for analytical instrument manufacturers.