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Laurel
Panel Meters, Counters, Timers
& Displays by Application
Click on the
links below for detailed product selection guides by application.
 1.
DC Voltage & Current
Display
DC voltage or current from power supplies, batteries and other DC sources
with 0.01% full scale accuracy. Options include analog outputs, relay
outputs, and serial communications.
- DC voltmeter ranges from
±20.000 mV to
±300.0 V, resolution to 1 µV.
- DC ammeter
ranges from ±2.0000 mA to ±5.000 A, resolution to 0.1 µA.
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2.
AC
Power Line Monitoring
Accurately monitor AC or true
RMS voltage or current, AC line frequency, or phase angle. Options include
analog outputs, relay outputs, and serial communications.
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Process Signal Display & Control
Accurately display readings in scaled engineering
units such as PSI, GPM, L/sec, or LBS from process
transducers whose output may be a DC signal such as
4-20 mA or 0-10 V, a pulsed / AC signal, or a
changing resistance. Capabilities include custom
curve linearization, square root extraction, rate
from successive readings, and totalizing from rate
signals. Transducer excitation output is standard on
most models. Analog outputs, relay outputs, and data
I/O options add functionality.
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 4.
Flow Rate,
Flow Total, Batch Control
Accurately display flow rate or flow
volume from flow transducers with a pulse or analog output. Read out
flow or total to 5 or 6 digits in engineering units such as Gallons,
GPM, or L/sec. Available features include square root extraction and
custom curve linearization.
- Dual-channel Pulse input rate
meter and totalizer. Display flow rate or flow total
(volume), add or subtract two flows for net flow or net volume, or
compute the ratio of two flows to control mixing operations.
- Analog input rate meter and
totalizer. Accept 0-1 mA, 4-20 mA or 0-10 V analog signal
from a linear or differential pressure flow transducer to display
flow rate or flow total (volume).
- Pulse input batch controller.
Control repeated fill operations using
the pulse signal from a turbine flowmeter.
- Analog input batch controller.
Control repeated fill operations using
the 0-1 mA, 4-20
mA or 0-10 V analog signal from a linear or differential pressure
flow transducer.
- Large digit displays.
Analog input process meters, pulse input rate meters, and pulse
input totalizers with 2.2" (57 mm) to 7.9" (200 mm) high digits.
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 5.
Weight, Force, Stress, Tensile Strength
The transducers may
be strain gauge elements which require bridge
excitation, zero and span adjustment, high
sensitivity, and multiple noise filtering modes. The
transducers may also output a conditioned 4-20 mA or
0-10 V signal, which can be accepted by a Laurel
process meter. Meter capabilities include high read
rate to 60/sec, peak hold, custom curve
linearization, and rate from successive readings.
Analog outputs, relay outputs, and data I/O options
add functionality.
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Load cell
meter. Powers up to four 350-ohm
bridges in parallel in 4 or 6-wire connection.
Five-digit display, sensitivity to ±20 mV full
scale.
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Strain
meter. Powers up to four 350-ohm
bridges in parallel in 4-wire connection.
Five-digit display, sensitivity to ±200 mV full
scale.
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Process
meter. Five-digit display for
conditioned signals such as 0-1 mA, 4-20 mA or
0-10 V.
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Scale /
weight meter.
Special firmware for weighing applications.
Features include display to 999,990, auto-zero,
auto-tare or manual tare, and display toggle
between gross or net weight.
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Large digit displays.
For strain gauges and load cells. Digit heights
2.2" (57 mm) to 7.9" (200
mm).
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 6.
Frequency, Rate, RPM,
Speed
Display frequency, rate or RPM to six figure
accuracy based on pulse signals at exceptionally fast update rates. Display
rates to 0.01% accuracy based on an analog signal or a changing resistance.
Features include square root extraction and custom curve linearization.
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8.
Pulse Counting, Digital or
Analog Totalizing
Count discrete pulses,
totalize pulse signals scaled to engineering units (e.g., volume in gallons
from a turbine flow meter), or totalize analog process signals. Count up to
a setpoint or down from a setpoint. Display rate or total using the same
meter. With two pulse inputs, add or subtract two totals, or take the ratio
of two totals.
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 10.
Measuring Position,
Length & Speed
Linear displacement or
speed scaled to engineering units can be displayed by quadrature meters
which accept A & B signals from shaft encoders, by dual dual-channel up
/ down totalizers which accept pulse inputs for position plus control
signals for count inhibit or count direction, or by potentiometer
follower meters where position is indicated by a changing resistance.
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 12.
Display &
Control from Serial Data
Displays driven by
the RS-232 or RS-485 output of a computer, PLC, or
instrument. The displays can be located in the same
panel as the data source, or be remote for
plant-wide viewing.
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6-digit, 1/8 DIN
remote displays. Up to 31 remotes can
be addressed on the same serial data line, with
an
optional
analog output and relays tied to the reading for
alarm or control.
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5 or 7-digit
large digit displays. Digit heights from
2.2" (57 mm) to 7.9" (200 mm) for viewing across
a plant floor or outside yard. Also available
for analog or pulse signals. Choice of
brightness and housings for indoor or outdoor
viewing.
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