Package: 1 ZJLCDM display only Overview A compact digital flow controller and display for monitoring and controlling liquid flow. Designed for easy installation and quantitative control when used with compatible flow sensors and solenoid valves. Password protected settings and calibration options provide reliable, repeatable operation. Key benefits Precise quantitative control: stop flow automatically when a preset volume is reached. Flexible operation modes: use as a measurementonly meter or as a closed loop controller with a solenoid valve. Secure configuration: password protection prevents accidental or unauthorized changes to settings. Easy calibration: adjust the K value on the display to match different flow sensors and improve measurement accuracy. Compact installation: small controller case and standard cutout for panel mounting. Main functions Realtime display of flow rate and totalized volume in liters or gallons. Dynamic faucet display while the flowmeter is running. Quantitative control output to a normally closed solenoid valve when the preset volume is reached. Optional temperature display when a 50K NTC temperature sensor is connected. Password protection for configuration values. Compatibility and connections Compatible with NPN flow sensors with 5 Vdc output (sensor not included). Solenoid valve control for DC 12 V normally closed valves drawing 0.3 to 0.5 A. Valve not included. Optional 50K NTC temperature sensor for liquid temperature display. Power input: DC 24 V with tolerance of plus or minus 8 V, 1 A supply required. Technical specifications Model: ZJLCDM display only. Power supply: DC 24 V +/ 8 V, 1 A. Flow sensor input: NPN type, 5 Vdc signal. LCD size: 3 inch with builtin backlight. Viewing angle: 0 to 120 degrees. Solenoid valve drive: DC 12 V, 0.3 to 0.5 A, normally closed. Controller case size: 103 x 77 x 35 mm. Controller panel cutout size: 98 x 73 mm. Quantitative range: 0.1 to 9999 liters. Temperature input: 50K NTC sensor required for temperature display. Operation notes To use as a dispenser, set the target volume and start the run. When the measured volume reaches the preset value the controller will output to the solenoid valve to stop flow. To use as a flow meter only, set the MAX quantitative value to 0 and do not connect a solenoid valve. The unit will measure and display total flow. Calibration is performed by adjusting the K value on the display to match the characteristics of the connected flow sensor. Typical applications Liquid dispensing and filling lines where precise volume control is required. Equipment or process monitoring for totalized flow measurement in industrial or commercial settings. Water or chemical dosing systems where automatic shutoff at a preset volume is needed. What is included and what to supply Included: one ZJLCDM display unit only. User must supply: compatible NPN 5 V flow sensor, solenoid valve (DC 12 V N.C.), DC 24 V power supply, and optional 50K NTC temperature sensor. Mounting and installation Small controller case fits standard panel cutout 98 x 73 mm. Simple wiring connections for flow sensor input, valve output, temperature sensor input, and power supply. See the product manual for detailed wiring diagrams, calibration steps, and password protection instructions.