Flow Computers / Totalizers with Temperature Compensation When the liquid can significantly expand or shring in the operating temperature range the error of measuring the volume will increase. In order to have more accurate volume measurement the flow computer / totalizer has to measure the temperature of the liquid and compensate for its exanding or shrinking. GFC200 flow computer / totalizer works with gasoline and diesel, measures and displays the temperature of the liquid in oC or oF and compensates the volume measured. The compensation can be disabled. GFC204 has an isolated 0-5V output for flow rate GFC204-1 has an isolated 0-10V output for flow rate and 30 points calibration table If you need more space for wiring inside the enclosure, please order GFC20xE. They have the same features but are mounted in one inch wider enclosures. GFC300 is a dual channel flow computer / totalizer for liquids, gases and steam with extremelly high accuracy that can accept signals from almost any volume flow meter. It can be set as a single channel, two independent channels or both channels can be used to calculate, display and control outputs with the sum or the difference of the totals, the sum of the flow rates, and other calculations. GFC300 has preset lists of liquids and gases for easier programming. It calculates the compressibility factors of the preset gases with high accuracy in a very large range of temperatures and pressures. GFC300 also calculates density of saturated and superheated steam with high accuracy by IAPWS-IF97 with the new additions from 2008. With its variety of isolated outputs GFC300 can control metering pumps, DC motor pumps, connect to SCADA systems, PLCs, remote displays and many other devices. When used as a dual flow computer it can be very useful when mixing gases or liquids in exact proportion, controlling the total flow of two different pumps filling the same tank, measuring the fuel used by diesel engines and many others. GFC300 flow computer / totalizer also has a fully compliant programmable RS485 MODBUS RTU port for baud rates up to 115 200. GFC301 is an IP65 (NEMA-4) wall mount dual channel flow computer for liquids, gases and steam with batch control capabilities, higher accuracy and resolution of the analog outputs and a square wave option for the pulses outputs. Features TWO UNIVERSAL FLOW INPUTS WITH 24VDC / 20 mA POWER FOR THE FLOW SENSORS TWO CALIBRATION TABLES WITH 30 POINTS LINEARIZATION FOR THE PULSE INPUTS TWO TEMPERATURE / DENSITY INPUTS, LOOP POWER 4-20 mA, 0.01% FS TWO PRESSURE INPUTS, LOOP POWER 4-20 mA, 0.01% FS TWO ISOLATED ANALOG OUTPUTS, 0.03% FS, 4-20 mA, 0-5V OR 0-10V FOR RATE, RATE A+B, PRESSURE OR TEMPERATURE TWO ISOLATED PULSE OUTPUTS UP TO 10 kHz, 100V / 100 mA, FOR TOTAL, TOTAL A–B OR TOTAL A+B TWO 250VAC / 5 A ALARM RELAYS WITH PROGRAMMABLE HYSTERESIS FOR RATE, RATE A+B, PRESSURE OR TEMPERATURE OR BATCH POWER CAN BE 85-250 VAC, OR 12VDC OR 24 VDC, ALL WITH HIGH ISOLATION, SURGE, REVERSE POLARITY, UNDERVOLTAGE, OVER-CURRENT AND SHORT CIRCUIT PROTECTION BRIGHT TRANSMISSIVE COLOR GRAPHIC DISPLAY WITH A WHITE BACKLIGHT