G Instruments
Instrumentation for professionals.
We do not need to copy. We lead.
G Instruments develops and manufactures micro power and low power magmeters (electromagnetic flow meters), flow meters, flow computers, flow totalizers, pick-up sensors, RPM computers
G Instruments designs and manufactures a broad range of
instrumentation and controls devices and systems for the
irrigation, industrial  and municipal market, like
  • Micro power magnetic pick-up sensor, GMS300
  • Low power magnetic pick-up sensor, GMS400
  • Micro power flow computers, flow totalizers,
    GFC101, GFC102, GFC103, GFC104 and others,
    can power the GMS300 pick-up sensor. Flow
    computers / totalizers with universal input, micro
    power, "C" size battery options .....
  • Low power flow computer, flow totalizer, GFC110
  • Low power flow computers, flow totalizers with
    universal input GFC111, GFC112, GFC113,
    GFC114, for irrigation, industrial and municipal
    applications ......
  • In-line 4 GPM magmeter (electromagnetic flow
    meter) with isolated MODBUS RTU, GMAG100.
    For industrial, irrigation and municipal applications.
  • Low power flow computer GFC111-MB with
    MODBUS RTU communication
  • Remote display for analog signals with MODBUS
    RTU communication, GRD101
  • Remote display for digital signals with MODBUS
    RTU capabilities, GRD120 .....
  • Other versions of GRD1xx remote display series
    with MODBUS RTU are coming soon
Use our FLOW COMPUTER COMPARISON  table

Please take a look at our existing products
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Micro power magnetic pick-up sensor
Micro power flow computer / totalizer with isolated 4-20 mA
Low power flow computer / totalizer, RPM computer / totalizer with isolated 4-20 mA output
Low power flow computer, flow totalizer
Power supply for GFC series flow computers, flow totalizers
Low power flow computer, flow totalizer
Low power magnetic pick-up sensor
No moving parts, very high accuracy, repeatability and
linearity, low consumption, wide voltage operating range,
high turn-down ratio, can measure highly pulsating flow.
The perfect meter to measure irrigation fertilizer, water
or mild chemicals:

Try our 1/4" inline GMAG100 magmeter
(electromagnetic flow meter).

  • GMAG100 - first of a series in-line magmeter
    (electromagnetic flow meter).
  • Typical features of our magmeter (elecromagnetic
    flow meters) series are very wide supply voltage
    range, low consumption, communication over
    RS485 MODBUS RTU, fast response, high
    repeatability and accuracy, multiple isolated
    outputs ...
  • Options include blue tooth and USB MODBUS
    RTU, analog outputs and more ...
  • Max. error 0.2% of rate, typical 0.1% of rate  
    (FS to 10:1), 500:1 turn-down ...
  • Connect to it a GFC101/111 flow computer or a
    GRD101 remote display to get a complete solution

ACCURACY TEST RESULTS, click here  
Micro power flow computer with isolated 4-20 mA
Power supply for GFC series flow computers, flow totalizers
GRD101 remote display, field configurable
Flow Calculator, free download
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Low power flow computer with universal input
GTT101 temperature transmitter
Low power flow computer / totalizer with temperature compensation
24 analog input, 0.01% FS, RS485 MODBUS RTU
GRD101-5V remote display with calibration table
Low power flow computer / totalizer with temperature compensation
GFC111 with RS485 MODBUS RTU
GFC420 has an analog 4-20 mA input
Micro power flow computer / totalizer with isolated 4-20 mA
GMAG200-15, a 1.5", 200 GPM in-line magmeter
coming soon. Steel body, CPVC liner, SS316 electrodes,
die cast aluminum watertight electronics box, very high
accuracy and turn-down ratio, very low consumption,
MODBUS RTU, isolated pulse output, isolated 4-20 mA,
empty pipe detection, over 250 psi, and more ....
GMAG200-15 magmeter
GMAG200-15 magmeter - very high accuracy, very low consumption
8 loop power 4-20 mA inputs MODBUS RTU
Universal input, 24V/0.21A power supply
GDA8M1 mixed signal data acquisition board
GRD120 remote display with isolated 4-20 mA output
GFC300 - top quality flow computer for liquids and gases