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High Performance
Emissivity-Independent
2-Color IR System
Complete Fiber Optic Infrared System
Includes Sensor and Rack Mount Monitor
⻬ Exceptional for
Induction Heating
⻬ Measurements
Independent
of Emissivity
⻬ Optional Signal
Processing
⻬ Optional Controller
Outputs
⻬ 1 mV/Degree Output
Standard
⻬ Optional 0 to 10 Vdc,
4 to 20 mA Linear
Second Output
⻬ Switchable 10 or
100 msec Time
Constant
This high performance system
allows one to view targets that
are not optically accessible with
standard line of sight
instrumentation.
This high performance emissivity
independent 2-color system
consists of a DP1541 and sensors.
The DP1541 is a single-channel,
19 inch rack mount 2-color control
system. Three sensors are
available; OS1542-L1-R1 or
OS1542-L1-R2 or OS1543-L1-R3.
OS1542 Sensors
⻬ Silicon Detector
⻬ 0.9 and 1.06
Micron Filters
⻬ Temperatures from
980 to 1800°C
⻬ Minimal Effect by
Steam or Hot Gas
OS1543 Sensors
⻬ Lead Sulfide Detector
⻬ 1.55 and 2.25
Micron Filters
⻬ Temperatures
from 450 to 850°C
Mounting
bracket
included.
OS1542/OS1543 Series
Starts at
$
4285
DP1541 2-color monitor, $5640,
with OS1543 general purpose fiber
optic sensor, $5640, shown smaller
than actual size.
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The OS1543 fiber optic sensor
head has a lead sulfide detector
filtered over wide bands centered at
1.55 and 2.25 microns. It is used as
a general purpose head which can
measure temperatures down to
250°C. It should not be used where
hot steam or gas is present.
The fiber optic cable assembly
differs according to certain
parameters specific to the
application. It allows remote
mounting of the OS1542 or OS1543
detector heads away from hot or
hazardous areas.
The OS1542 and OS1543
fiber optic sensors are
designed specifically to work
with the DP1541 2-color
emissivity-independent
monitor and the associated
fiber optic cable assembly.
The small size of these
probes makes them well
suited for installations with
limited mounting room. They
are unaffected by RFI and
EMI noise, which also make
them excellent for use in
hostile environments like
induction or microwave
heating.
The OS1542 and OS1543
fiber optic sensors operate at
2 wavebands and utilize an
energy ratio to calculate
temperature. They can,
therefore, measure
temperature on objects
whose emissivity is unknown
provided the emissivity at all
temperatures is proportional
at the 2 wavebands used for
the measurement, which
is typical.
The OS1542 fiber optic
sensor head has a silicon
detector filtered at narrow
bands centered at 0.90 and
1.06 microns; it is used
primarily at high temperatures
and is minimally affected by
steam and hot gas.
Available Probe Types
L1 Lens Probe (Standard) L2 Ceramic/Metal Tip
L3 Polymer Bolt L4 Ejector Pin Probe
L1
L4
L2
L3
OS1542 high temperature
fiber optic sensor, $4285,
shown smaller than actual size.
Typical Fiber Optic Probes
shown. L2, L3 and L4 are
custom assemblies, Consult
OMEGA for details. L1 shown
with optional bifurcated cable
for backlighting.
B
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J-119
Rack Mounted Monitor
The DP1541 two-color temperature
monitor measures temperature
independently of emissivity, and is
unaffected by dust, smoke or other
contaminants in the field of view. Only
20% of the field of view is needed to
ensure accurate measurements,
regardless of the target size. Through
the use of a bifurcated fiber optic
cable, the energy radiated by the
target can be divided between two
separate infrared detectors within the
sensor head. Each detector, having a
different spectral band pass filter,
sees a slightly different target energy
level. The signals from these two
detectors provide the ratio to provide
the final temperature readout.
The DP1541 two-color monitor
measures temperature independently
of changes in target emissivity,
provided that the emissivity changes
are proportional in both wavelength
bands, thus cancelling out the change
in emissivity.
The meter also incorporates a special
feature called “slope control,” which
allows precise emissivity correction for
the temperature band of interest.
The “slope control” adjustment
compensates for non-graybody errors
by adding a percentage of the singlecolor temperature to the two-color
temperature to achieve the correct
temperature output.
The DP1541 monitor has optional
signal processing outputs for
datalogging or taking trend analysis.
These outputs include Peak Sense
and Hold, Signal Averaging, Valley
Sense and Hold, Fast Rise, Variable
Decay Time Sampling and Sample
Timed Hold.
The unique features of the DP1541,
along with the OS1542 or OS1543
infrared sensors, make it ideal for
applications like wire and rod forming,
molten metal, heat treating, crystal
growing. The system may be used in
applications considered difficult or
impossible for conventional direct
viewing infrared systems.
The DP1541 is recommended for
situations where direct target sighting
is impossible due to obstructions,
where RF or EMI interference is
present, or where nuclear radiation is
present (requiring the electronics to
be located in a safe area), and in
harsh environments.
The DP1541 monitor can be supplied
with a trifurcated fiber optic cable that
permits “backlighting” with a light
source for precise pinpointing of the
target location at all times.
Any non-contact temperature
measurement can be taken with the
proper sensor configuration, along
with the DP1541 monitor. Consult
OMEGA for the proper system
configuration for your application or
for available custom configurations.
The system will consist of the DP1541
two-color emissivity-independent
monitor and either the OS1542 or
OS1543 sensor head, along with
a 3 m (10') interconnecting cable
and the fiber optic cable assembly.
Important factors to be considered in
determining the fiber optic assembly
best suited for your application are:
the distance from fiber optic lens to
the surface being measured; the size
of the surface; the temperature range
to be measured; the ambient
temperature around the fiber optic
cable; the length of the fiber optic
cable needed; how the surface is
being heated, and the atmospheric
conditions between the sensor and
the product.
OMEGACARESMextended warranty program
is available for models shown on this page.
Ask your sales representative for full details
when placing an order. OMEGACARE
SM
covers parts, labor and equivalent loaners
DP1541 two-color monitor, $5640, with
OS1543 general purpose fiber optic sensor,
$4895, shown smaller than actual size.
Specifications for
DP1541 Monitor
Temperature Range: 250 to 2575°C
(480 to 4665°F); LED shows out-ofrange conditions
Accuracy: ±1% rdg
Repeatability: ±0.5% rdg
Resolution: 1°C/F
Ambient Temperature:
10 to 50°C (50 to 122°F)
Power: 115 Vac standard
(230 Vac optional)
Power Dissipation: 50 W max
Output: 1 mV/degree
Display: 3
3
⁄4 digit, max rdg 3999
Time Constant:
10, 100 msec, (10 to 63.2%)
Spectral Response: 0.90 and
1.06 microns or 1.55 and
2.25 microns (center bands)
Fiber Optic Cable: Glass or quartz fiber
with heavy duty SS jacket standard,
0.070 cable Dia., 149°C (300°F) max
ambient temperature
Optional Controller Outputs:
2A SPDT relay or 20A SSR
@115 Vac
Signal Processing Adjustment:
0.5 to 10 sec hold and decay times
Dimensions:
13.34 H x 48.26 W x 30.48 cm D
(5.25 x 19 x 12")
Weight: 5.44 kg (12 lb)
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⻬ Many Different
Assemblies Available
⻬ Small Spot Sizes
Down to 0.004"
⻬ Ceramic/Metal Tip
Probe for Induction
Heating Where Probe
is Close to Surface
Available
⻬ Trifurcated Fiber
Cable for Two Color
Measurements
and Back Lighting
of Target Area
To Order
(Specify Model Number)
Model No. Price Description
DP1541-(*) $5640 Single channel 48 cm (19") rackmount
two-color monitor, slope control, 1 mV/ degree output,
3
3
⁄4 digit display; (for use with OS1542
or OS1543 sensors)
* Specify analog output: “F” for 1 mV/°F, or “C” for 1 mV/°C.
Comes with complete operator’s manual.
Consult OMEGA for information on custom systems.
Rackmount Monitor
Optional Second Output
Signal Processing Outputs
Order Add’l.
Suffix Price Description
-V $75 0 to 10 Vdc
-MA 125 4 to 20 mA
Order Add’l.
Suffix Price Description
-PS $330 Peak sense
and hold
-SA 330 Signal averaging
-VS 330 Valley sense
and hold
-ST 330 Sample timed hold
-FR 330 Fast rise
variable decay
FIBER OPTIC ASSEMBLY
LENS PROBE
OS1500-C41
INTERCONNECTING
CABLE
DP1541
METER
CERAMIC OR
METAL TIP
OS1542
OR
OS1543
OPTIONAL USE WITH
LENS PROBE ONLY
OS1500-BLS
Dimensions: mm (in)
Note: The OS1542 and OS1543 operate solely with the DP1541 thermal monitor.
Comes with interconnecting cable for use with DP1541 monitor, fiber optic lens assembly,
fiber optic cable and complete operator’s manual.
Ordering Example: DP1541-C-MA-VS, 19 inch rack mount monitor with °C display and
1 mV/°C analog output, 4 to 20 mA second output, and valley sense and hold,
$5640 + 125 + 330 = $6095. OCW-3,
OMEGACARESMextends standard 2-year
warranty to a total of 5 years ($350)
$5640 + 350 = $5990.
To Order
(Specify Model Number)
Base Temperature Spot Size @ Cable
Model No. Price Range Focal Dist. Length
OS1542-L1-R1-4 $4285 1050 to 1800°C 1.2" @ 36" 1.2 m (4')
(1925 to 3270°F)
OS1542-L1-R2-4 4285 980 to 1650°C 0.18" @ 14" 1.2 m (4')
(1850 to 3000°F)
OS1543-L1-R3-4 4895 450 to 850°C 0.076" @ 6" 1.2 m (4')
(847 to 1562°F)
We make running changes when
technical advances allow. Check at time
of ordering for additional features.
MOST POPULAR MODEL HIGHLIGHTED!
152
(6.00)
108
(4.25)
63.5
(2.50)
102
(4.00)
GAIN A
GAIN B
82.5
(3.250)
102
(4.00)
102
(4.00)
21
(0.820)
25.4
(1.00)
9.7
(0.38)
Page 5
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