GMTX electronic indicator - Used Laboratory Equipment and New Lab Instrument Supplies, UK

Suitable for use with body options, the

VAMPIRE (Variable Area Micro Processor

Indicator Readout Electronics) has

a totally solid state measurement system,

eliminating mechanical hysteresis errors.

Microprocessor interpolation between

flow data points, stored in factory

calibrated look-up tables, gives an

improvement to ±1% accuracy for this

technique.

The loop powered 4-20mA transmitter is

certified intrinsically safe to CENELEC

standards, for use in a potentially hazardous

area. Both loop powered and AC

mains powered units have separate high

and low flow alarm outputs.

• 4-20MA Transmitter

• Intrinsically safe approval

• Liquid or Gas Flow Calibration

• Built-in Flow Totaliser

• Operator adjustable High and Low

Alarms

• 1% Accuracy

• VAmeter reliability

• Program setting password

protection

The VAMPIRE is a metal tube variable

area flowmeter: as the flow up through

the precision machined tapered tube

increases, the float rises, reaching an

equilibrium position. Electron beam

welded within the float casing is a

magnet. Two “Hall effect” magnetic field

sensors measure both the vertical and

horizontal components on this field. The

angle of the magnetic field defines the

position of the float in the tapered tube.

This solid state measurement eliminates

the problems of mechanical hysteresis

associated with conventional magnetic

pointers. Field angle is also independent

of the absolute value of magnet strength,

and sensor sensitivity.