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APG
C US
Rev. 7.05
Automation Products Group, Inc.
®
OPL
Optical Liquid Level Sensors
OPL Optical Liquid Level Sensors
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Operational Description
e OPL series utilizes the optical
principles of a prism to detect the
presence or absence of a liquid
as compared with air. e sensor
contains a small infrared LED and
a phototransistor light receiver.
Light from the LED is directed into
the prism at the tip of the sensor.
When the container is empty, light
from the LED is reflected within
the prism back to the receiver. As
the liquid rises to cover the sensor,
light is refracted out into the liquid
and is not returned to the receiver.
e change in state is detected and
results in an output signal.
e OPL is designed to meet
standards set by major food and
health agencies around the world. It
conforms to the Japan Ministry of
Health and Welfare and to the FDA
standards in the USA.
UL approved components are
used in construction of the sensor.
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Automation Products Group, Inc.
1025 West 1700 North Tel. 1/888/525-7300
Logan, UT 84321 USA Fax 1/435/753-7490
Very small OEM type optical level
sensors
Standard rubber grommet fitting
for commercial applications
Estel sensor material suitable for
pure water and most oils
Polysulphone sensor material
option for acids and alkalines or
high temperatures
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DC powered at 5 VDC, other
voltages are available on request
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PNP transistor output
ReceiverTransmitter
Sensor in Air
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ReceiverTransmitter
Sensor in Liquid
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APG
Automation Products Group, Inc.
®
OPL Optical Liquid Level Sensors
■
Applications
e OPL series of sensors are
designed for low cost liquid level
monitoring and leak detection.
Typical industries served are:
semiconductor, clean water,
pharmaceutical, automotive OEM,
machine tool, home appliances such
as oil fitted heaters, and electrical
suspended solids to coat sensor and
block optical beam). Typical liquids
sensed are: petroleum and vegetable
oils (diesel, kerosene, gasoline,
hydraulic, lubricant, transmission
fluid), alcohols (ethyl, methyl),
ethylene glycol (antifreeze) and pure
water (DI or distilled water).
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Options
Polysulphone sensor body will
allow for use in caustic liquids
such as acids and alkalines. Check
chemical compatibility tables at the
APG website or other sources for
specific compatibility.
equipment such as liquid insulated
transformers and capacitors.
e optical principle employed
is suitable for pure liquids (no
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Specications
OPL-003 OPL-004 OPL-006
PERFORMANCE
Function: Switch on low level Switch on high level Switch on low level
Sensor Output: PNP open collector; PNP open collector; PNP open collector;
18 mA max. 18 mA max. 18 mA max.
500 mA PNP 500 mA PNP 500 mA PNP
Approvals: UL approved components UL approved components UL approved components
ELECTRICAL
Supply Voltage: 5 VDC (±0.5 VDC) 5 VDC (±0.5 VDC) 5 VDC (±0.5 VDC)
10-30 VDC on request 10-30 VDC on request 10-30 VDC on request
Wiring: #26 AWG, 3 cond. #26 AWG, 3 cond. #26 AWG, 3 cond.
Connectors available Connectors available Connectors available
PHYSICAL
Material: Estel sensor (standard) Estel sensor (standard) Polysulphone (standard)
Potting Compound: Epoxy Epoxy Silicone
Dimensions: 0.45 x 1.83 in. standard 0.45 x 1.48 in. standard 0.45 x 1.48 in. standard
(11.5 dia. x 46.5 mm) (11.5 dia. x 37.5 mm) (11.5 dia. x 37.5 mm)
Rating: NEMA 6P/IP67 NEMA 6P/IP67 NEMA 6P/IP67
Mounting: Rubber grommet (standard) Rubber grommet (standard) Rubber grommet (standard)
ENVIRONMENTAL
Operating Temperature: -4 to 140°F (-20 to 60°C) -4 to 140°F (-20 to 60°C) -4 to 302°F (-20 to 150°C)
Storage Temperature: -22 to 158°F (-30 to 70°C) -22 to 158°F (-30 to 70°C) -22 to 338°F (-30 to 170°C)
Maximum Pressure: 10 bar, 145 psi (1 Mpa) 10 bar, 145 psi (1 Mpa) 10 bar, 145 psi (1 Mpa)
Automation Products Group, Inc.
1025 West 1700 North Tel. 1/888/525-7300
Logan, UT 84321 USA Fax 1/435/753-7490
2
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APG
Automation Products Group, Inc.
■
Corrosion Resistance Guide
®
OPL Optical Liquid Level Sensors
Estel Body Material of
Optic Level Sensor and ermistor
Level Sensor
is chart is intended as a general
guide and has been complied from
many sources believed to be reliable,
however, no guarantee is implied.
Because of the extensive scope
of this field, the tabulation is not
complete or conclusive. Corrosion
rates vary widely with concentration,
temperature and the presence of
abrasives. Impurities or other trace
elements common in industrial
liquids may inhibit or accelerate the
reaction of the material.
Key to Ratings:
A: No effect Usable
B: Minor effect Usable, but life my be
shorter than usual
C: Fair to poor Do not use
D: Not recommended Do not use
Chemical Rating
Acetic Acid 5% B
Acetic Acid 10% D
Acetone C
Alcohols Ethyl A
Methyl A
Aromatic Solvents C
ASTM Motor Fuel A A
B A
C C
ASTM Ref Oil #1 A
#2 A
#3 A
Beer A
Benzene C
Bleaching Liquors 5% A
10% C
Calcium Hydroxide B
Calcium Hypochlorite 5% A
10% C
Calcium Oxide B
Chlorine Water D
Chlorine D
Cider (Apple Juice) B
Ethanol A
Ethylene Glycol A
Fatty Acid B
Ferric Chloride C
Ferrous Sulfate B
Fruit Juice B
Gasoline A
Glucose (Corn Syrup) B
Glue, P.V.A. B
Glycerin A
Grease A
n-Hexane C
Hydrochloric Acid D
Hydrogen Peroxide D
Jet Fuel/ASTM-A D
Kerosene A
Lubricant Oil A
Specifications are subject to change without notice.
Immersion test conditions: 73°F (23°C) x 672 hours
The estel material is chemically similar to DuPont Hytrel® (Reg TME.I. DuPont de Nemours
& Co.)
Chemical Rating
Methanol A
Methyl Ethyl Ketone B
Methyl Isobutyl Ketone B
Milk A
Naphtha B
Nitric Acid D
Oils Aniline D
Castor A
Corn A
Diesel Fuel A
Fuel A
Mineral A
Silicone A
Transmission A
Vegetable A
Petroleum B
Propane (LPG) B
Propylene Glycol A
Salt Brine (NaCl Saturated) A
Sea Water A
Soap Solutions A
Sodium Carbonate B
Sodium Bicarbonate B
Sodium Chloride A
Sodium Hydroxide 10% A
20% B
50% D
Sodium Hypochlorite 20% A
100% D
Sulfuric Acid 10% A
25% B
50% D
Toluene C
Urea B
Vinegar C
Water Fresh A
Salt A
Whiskey B
Wine A
Xylene C
Automation Products Group, Inc.
1025 West 1700 North Tel. 1/888/525-7300
Logan, UT 84321 USA Fax 1/435/753-7490
3
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APG
Automation Products Group, Inc.
0.118±0.004
3.0±0.1
Ø0.393+0/-0.008
10.0+0/-0.2
Drilled or
Punched Hole
Metal or
Plastic
Tank Wall
1.67±0.06
4.25±1.5
1.34+0.04/-0.08
34.0+1.0/-2.0
1.34+0.04/-0.08
34.0+1.0/-2.0
0.62
15.8
Ø0.45
11.5
Ø0.45
11.5
Ø0.45
11.5
Ø0.39
9.9
Ø0.39
9.9
Ø0.39
9.9
1.83
46.45
1.48
37.5
1.48
37.5
OPL-003 OPL-004 OPL-006
®
OPL Optical Liquid Level Sensors
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Installation
Standard rubber grommet mounting.
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Wiring
Blue
Yellow
Gray
10K
5.0VDC
OUT
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Dimensions — in./mm
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Ordering Information
OPL – –
Basic Function
003 Low level (switch ON when dry)
004 High level (switch ON when wet)
006 Low level (switch ON when dry); high temperature
007 High level (switch ON when wet); high temperature
Power
(null) 5 VDC standard voltage
S 12-30 VDC
Automation Products Group, Inc.
1025 West 1700 North Tel. 1/888/525-7300
Logan, UT 84321 USA Fax 1/435/753-7490
4
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