AMS Instrumentation & Calibration
Unit 20 / 51 Kalman Drive
Boronia VIC 3155
Tel: 03 9017 8225
Fax: 03 9729 9604

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Compressed air mass flowmeter

FLUID Components, represented in Australia by AMS Technical Services , has released the FlexMASSter ST98B-CA thermal mass flowmeter. It is factory precalibrated for rapid delivery and installation.

Optimises process air flow rates.

Flowmeters installed on compressors and air lines measure air flow, allowing operators to optimise process air flow rates and detect leaks. With air consumption data available, plant maintenance staff can quickly identify leaks, locate their potential sources and determine whether repair or overhaul of equipment is necessary. A single air line with a 3mm hole will leak at rate of 260Nm³/h, which can result in an energy cost of $6000 or more a year.

In large plants batteries of compressors can be analysed during peak and off-peak time usage. Controllers can then run the most efficient compressors at certain loads based on the feedback provided by the flowmeter. This allows a more efficient plant and a longer life span for compressors.

Flow detection capability ranges from 1.8smps to 180smps in air or nitrogen. Inputting the pipe ID allows the system to provide selectable mass flow units such as scfm, lbs/h and Nm³/h. Accuracy is +1% of reading +0.5% full scale, with a repeatability of +0.5% of reading.

The 4mA-20mA output is range adjustable from a 10:1 to 100:1 turndown. Voltage output is also available and selectable in 0V dc to 10V dc, 0V dc to 5V dc, or 1V dc to 5V dc. The package design allows easy access to the termination points and communication ports. The flowmeter comes in integral and remote configurations. It is supplied in a weather-resistant NEMA 4X enclosure rated for Division 2 areas. An RS-232C serial port interfaces with FCI's optional FC88 Communicator, a computer, or any ASCII terminal.

The ST98B-CA's sensing element is made up of two all-welded 316 stainless steel thermowells that protect its platinum resistance temperature detectors (RTDs). One RTD is heated relative to the reference RTD and the temperature difference between the two is related to the process mass flow rate. The standard flow elements have adjustable insertion lengths of 25mm to 300mm. The process connection is a three-quarter inch male NPT with a Teflon ferrule rated to 10 bar (g) and 93°C.

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Model ST51 Mass Flow Meter from AMS Instrumentation & Calibration (5-Aug-2008)
Fluid Components International (FCI) has released its new Model ST51 Mass Flow Meter for owners, operators and manufacturers of biogas production and methane capture and recovery systems. The Model ST51, available from AMS Instrumentation & Calibration is designed specifically to solve the challenges to flow metering in bioprocess generated methane.

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