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Industrial Insertion and In-Line Mass Flow
Meters Sierra’s industrial insertion and in-line mass flow meters
monitor the mass flow rate of air and process gases.
Utilizing Sierra’s patented Steel-Trak sensor, none of them require the temperature
and pressure corrections necessary for pitot-tube, orifice, or other volumetric flow
monitoring devices.
In 1973, Sierra Instruments introduced the first thermal anemometer for industrial use
– the rugged, field-proven Accu-Flo Meter. This pioneering achievement is the first
link in a chain of Sierra innovations, culminating in the incredibly rugged Steel-Trak
sensor flow.
Sierra’s industrial meters utilize two sensors – a velocity sensor and a
temperature sensor that automatically corrects for changes in gas temperature.
Sierra’s proprietary electronics heats the velocity sensor at a constant
temperature differential above ambient and measures the cooling effect of the gas flow.
Since the molecules of the gas carry away heat, the output signal is directly proportional
to gas mass flow rate.
The sensors’ performance is unexcelled: +-2% of reading accuracy; 0.2% of full scale
repeatability; and one second time response. They accurately monitor velocities as low as
5 SFPM and as high as 15,000 SFPM. Their 316 stainless steel sealed encasements make them
virtually indestructible
and contamination-resistant.
S-Series SMART Electronics Now Available on all Industrial Insertion and
In-Line Mass Flow Meters Sierra Instruments' Smart Thermal Mass Flow Meters provide a
variety of field-adjustment features, as well as the ability to confirm or
"field-validate" the meter's calibration and measurement accuracy.
The microprocessor-based transmitter integrates the functions of flow measurement,
flow-range adjustment, meter validation and diagnostics. Mass flow rate and totalized
flow, as well as other configuration variables, are displayed on the meter's 2 x 12
back-lit LCD panel. The programmable transmitter is easily configured via an RS-232 com
port and Sierra's Smart Interface PC-based software; or via the display and function
switches on the front panel of the device.
The S-Series electronics allows users to easily configure or change the following
parameters: flow range, totalizer, alarm settings, time response, zero flow cut-off and a
calibration correction factor to compensate for flow profile variations or specific
application conditions. Smart Interface also furnishes a means to directly adjust the
meter's calibration for a different gas composition or flow range.
The instrument electronics provide a unique feature not available in any other thermal
mass flow meter: a means to confirm or "field-validate" that the flowmeter's
primary sensing elements have not drifted or shifted from their original calibration.
Sierra's Smart Interface software also guides the operator through a procedure that checks
the system electronics, linearization, and microprocessor functionality to fully validate
the instrument's performance.
Sierra's S-Series Smart Thermal Mass Flow Meters are FM, CSA and Eex- approved for
operation in hazardous areas and are available with a variety of input-power,
output-signal, process-connection, and packaging options.
Series 640S Steel-Trak Insertion Mass Flow Meter
Dependable Single-Point Flow-Rate Monitoring in Pipes and Ducts.
The Series 640S inserts easily into ducts and pipes to monitor total gas mass flow rate.
Typical applications for industrial process control include combustion air flow, natural
gas fuel flow, custody transfer, and stack gas
emissions. This instrument features low pressure drop, wide rangeability from 0 to 12,000
SFPM, FM, CSA and Eex-approvals.
Series 780S Steel-Mass In-line Mass Flow Meter
with Flow Conditioning
Precise In-Line Measurement of Process Gas Mass Flow.
Take a look at our Sierra Model 780
part number selection guide !
The Series 780S gas flow meter offers improved measurement capabilities in installations
where long straight pipe runs are not available. The thermal mass flow meter incorporates
a unique dual-plate flow conditioner to eliminate velocity profile distortions as well as
swirl and temperature stratification in the gas stream. The Model 780S is FM, CSA and Eex-
approved for hazardous locations and is available in pipe sizes from 1/4 inch to 8 inches,
in flow ranges from 0-15 SCFM to 0-7000 SCFM.
Series 760/780UHP-S Ultra High Purity Mass Flow Meter Designed and built to meet Ultra
High Purity standards.
The Series 760UHP-S and 780UHP-S mass flow
meters are the instruments of choice for gas distribution service in semiconductor fabs,
pharmaceutical production and other ultra-clean processes. Real-time monitoring of gas
usage
provides reliable information on consumption and usage patterns in the manufacturing area,
to be used for both billing and diagnostic purposes.
The Ultra High Purity meters are constructed of 316L electropolished tubing with a 7-10 Ra
or 20-25 Ra interior finish. The tubing's smooth, level surface eliminates turbulence and
erosive action, which generates particulates.
The Model 780UHP-S incorporates flow conditioning to remove flow profile distortions,
swirl and temperature stratification in less than three diameters. The resulting
measurement accuracy and low permanent pressure loss solves a common and persistent
problem found in gas distribution service.
The meter is FM, CSA and Eex- approved for operation in hazardous areas and is available
with a variety of input-power, output-signal, mounting and packaging options.
Series 650 Flow Averaging Arrays
Multi-Point Mass Flow Rate Averaging for Pipes and Ducts.
When flow is not uniform enough for single-point monitoring, Series 650 Arrays can be
easily inserted into pipes or ducts to accurately average up to 50 gas mass velocity
points. In a typical power plant, the Series 650 monitors preheater air, fuel gas flow,
HVAC air flow, and stack emissions. Only Sierra’s Series 650 offers you these
advantages. Up to 10 one-inch-diameter probes, each with up to five velocity sensors, can
be daisy-chained to a Sierra
Collector-Box (see page 5). The Collector-Box delivers the grand average mass velocity of
the array. The Series 650 averages the individual gas mass velocity readings with
exceptional accuracy.
Series 670 CEMS Stack Flow Monitor
Rugged Stack Flow Monitoring Systems that Exceed EPA Requirements.
Sierra’s Model 670 CEMS Stack Flow Monitor is designed to meet all EPA specifications
and withstand the heat, corrosion, and particulate-laden environment in which it must
operate. The system complies with the equal-area measurement criteria of EPA Method 1 and
is ideal for
monitoring the non-uniform flow profiles found in utility stacks and ducts. Features
include, the FR (Fast Response)
sensor, developed for CEMS, provides faster response to temperature and velocity cycling,
independence from outside air temperature changes, and excellent low-velocity sensitivity.
EPA- specified self-testing to meet all Federal
Register requirements.
System Electronics
Versatile Electronics for Industrial Gas Flow Measurement.
The microprocessor-based system electronics powers the probe and provides more output
choices and options than any competing electronics package. The electronics can also be
mounted up to 350 feet away in NEMA 4X or explosionproof enclosures, and offers you these
advantages
- Three output choices: mass velocity, mass flow, or volumetric flow, analog outputs of
the average of individual point velocities, available in any range from 0–100 to
0–12,000 SFPM in your choice of engineering units. RS
485 output along a shielded, twisted pair cable up to 4000 feet long.
The Collector Box
The one-of-a-kind Collector-Box averages the outputs from up to 32 Probe-Boxes to provide
remote readout and velocity averaging. The Collector-Box’s long list of features
simplify flow monitoring operations and provides 32-character alphanumeric LCD display of
grand average flow rate, individual point mass velocities in the array, and totalized mass
(lbs, kg, etc.). High, low, or window flow rate alarms with dry contact outputs, choice of
mass velocity, volumetric flow rate, or mass flow rate in your choice of engineering
units. RS 485 output signal of average flow rate and of all individual velocity points in
the array. Continuous system self-diagnostics. S-Series Electronics Microprocessor
Electronics Improve Industrial Mass Flow Meter Performance.
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