The document describes the Referee OST, a flexible type TLG probe developed by Hi-Level to monitor and record fluid level, volume, temperature, and water level of large aboveground and underground storage tanks. The Referee OST can measure fluid levels up to 20 meters with 1mm accuracy and 0.005% precision. It also measures temperature to provide temperature-corrected volume readings and can be shipped overseas due to its flexible probe design.

1. ‘Referee OST’ is flexible type TLG probe, which
is developed to meet industry needs for large-sized
aboveground and underground storage tanks with
lower cost. ‘Referee OST’ continuously monitors
and records fluid level, volume, temperature, water
level of storage tank reliably.
‘Referee OST’ can measure fluid level up to 20m
with 1mm accuracy, which is surprising 0.005%
precision to its full-scale.
No more storage fluctuation after receiving
stock, daily, year-round. ‘Referee OST’ enables you
to manage your fluid inventory with temperature-
corrected volume! With built-in temperature
measurement feature, temperature-influenced
Gross Volume can be converted to more reliable
temperature-corrected Net Volume.
‘Referee OST’ can be shipped to overseas
without hardship thanks to our special ‘flexible
type’ probe design. Though flexible type has
shorter history, 70+ sites in South Korea have
switched to ‘Referee OST’ and the number of
installed sites is keep rising.
Description
Referee OST
Flexible TLG for Oil Storage Tank
• Magnetostrictive method flexible type probe
• 1mm Level Accuracy
• Measuring range 20m Max
• Measures Fluid and Water level
• Built-in temperature sensor
• Net Volume and Gross Volume can be displayed
• Special mode for stock receiving
• Various fluid – Gasoline, Diezel, Ethanol, etc.
• Can add Explosion-proof field LCD display
• Can detect fake oil with value-added option
Features
Flexible Probe
~ 20 meter
Explosion-proof grade
Field Monitor
Indoor
LCD Monitor
Installed Area / Records
Hi-Level is looking for
Distributor & Business Partner
for Referee OST
Army base Factory AviationNavy base Harbor

2. Attribute Specification
Sensing Type
Magnetostrictive
Flexible Type Probe
Purpose Industrial instrumentation.
Measuring Type Fluid and Water Level
Measuring Range 20,000mm MAX
Level Accuracy 1 mm
Floater separation distance 30mm MAX
Temperature sensing range -40 ~ 70℃
Temperature Accuracy ± 0.5℃
Probe material SUS316
Floater 재질 NBR
Applicable fluids Oil, Water, Liquid chemicals
Max pressure 30 Kgf/cm2
Weight 0.5 Kg/m
Communication type RS485, Zigbee, Bluetooth
Current Intensity
Stand By : 30 uA at 8V
Active : 1 ~ 20 mA at 8V
Explosion-proof grade
Ex ia IIB T4 (Intrinsic Safe)
KCs 12-KB2BO-0185(By ktl)
Explosion-proof
field LCD display
In Office
(Not in Explosion-proof zone)
Specification
Referee OST : Flexible TLG for Oil Storage Tank
1. Housing with PCB – AL6061
2. Connection pipe – SUS316
3. Cable holder - Waterproof
4. Reducer – Connects to inserting pipe
5. Upper flexible pipe holder – Waterproof, SUS316
6. Fluid level floater – NBR with magnet
7. Water level floater – NBR with magnet
8. Under flexible pipe holder – Waterproof, SUS316
9. Anti-shake weight
10. Field LCD – SUS316, Explosion-proof grade
11. Indoor Controller LCD display with printer
Parts
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9
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CertificationSystem Overview
KTC Test result
* Height(Level), Temp,
Specific Density
HQ & Factory : 72-35 GongHang-ro, 1347 Beon-gil, GangSeo-gu, Busan, South Korea
Seoul Office : #12F, 216 Teheran-ro , Gangnam-gu, Seoul, South Korea
T. +82-51-502-3399 F. +82-51-338-4799 E. hi-level@naver.com
www.hilevel.co.kr
T r u s t w o r t h y & I n n o v a t i v e
All copyright reserved to Hi-Level Co., Ltd.
10 11
[VER]HiCaPa/MAIN_v5_1/EN/181101
* Product design are subject to change depending on product version.

3. Gas station owners long suffered from fake oil
for ages. To relieve burden for anyone who suffer
from fake fuel, Hi-Level added value-added
feature to our pre-existing best-selling ‘Referee
PRO’ to detect fake fuel.
Gas station owners no longer need to worry
about fake fluid when receiving stock fuel. Alert
will go off to gas station owner if physical warning
light or PC software warning screen is handy, and
he/she will know irregularity immediately.
So, How this magic works? Well, Hi-Level made
‘Referee PRO-S’ to measure relative density
(specific density) reliably, simultaneously
measuring fluid level and water level, thanks to
our development team’s years of R&D effort. As
genuine fuel has constant or regular relative
density value, irregular value means fake fuel mix.
Description
* Relative Density?
Relative density, or specific gravity, is the ratio of
the density (mass of a unit volume) of a substance
to the density of a given reference material
Referee PRO-S
TLG Probe with Relative Density Sensor
• Optional Relative density(Specific Gravity) Sensor
• Detect for irregular relative density
• Warning light connectable up to 8EA / Controller
• 0.001 Relative Density Accuracy
• Special mode for stock receiving
• Various fluid – Gasoline, Diezel, etc.
Features - Relative Density
Indoor
LCD Monitor
Please consult with Hi-Level staff and
tell us how your country is dealing with
Fake Fuel and its Detection.
Warning
Light
Referee PRO-S
Relative Density
Sensor-Probe
Gas Station Owner is now Happy!
- This can be YOU! -
• Magnetostrictive method Liquid level meter
• Measures Fluid and Water level
• 0.1mm Level Accuracy
• Measuring range 4m Max
• Industrial Flexible type(Max 20m) available
• Built-in temperature sensor
• ± 0.5℃ Temperature Accuracy
• Alarm for Low level, Overflow, Water
• Automatic/manual stock managing and viewing
Features - Probe

4. Referee PRO-S : TLG Probe with Relative Density Sensor
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Attribute Specification
Sensing Type
Magnetostrictive
Liquid Level Meter
Measuring Type
• Fluid and Water Level
• Relative Density
• (Specific Gravity)
• Temperature
Relative Density Range
Gasoline : 0.5~0.8
Diesel : 0.7~1.0
Relative Density
Accuracy 0.001
Applicable fluids Oil, Water, Liquid chemicals
Measuring Range 4,000mm MAX
Level Accuracy 0.1 mm
Pipe material SUS 304
Floater material NBR
Weight 0.5 Kg/m
Communication RS485, Bluetooth, Zigbee
Temperature Accuracy 0.5℃
Explosion-proof grade KCs Ex Ia IIB T4
SpecificationParts
1. Housing with PCB – AL6061
2. Connection pipe – SUS316
3. Fluid level floater – NBR with magnet
4. Relative density floater – NBR with magnet
5. Water level floater – NBR with magnet
6. Stopper – SUS316
3 4
CertificationHow does it work?
Genuine fuel has
regular density
Mixed Fake Fuel shows
irregular density
Alarm
Triggered
Official test result granted by
KTC center shows relative
density accuracy of 0.001
HQ & Factory : 72-35 GongHang-ro, 1347 Beon-gil, GangSeo-gu, Busan, South Korea
Seoul Office : #12F, 216 Teheran-ro , Gangnam-gu, Seoul, South Korea
T. +82-51-502-3399 F. +82-51-338-4799 E. hi-level@naver.com
www.hilevel.co.kr
T r u s t w o r t h y & I n n o v a t i v e
All copyright reserved to Hi-Level Co., Ltd.
[VER]HiCaPa/MAIN_v5_1/EN/181101

5. Actually, our customers DO NOT CARE about
our TLG anymore after installation, as our sensor’s
malfunction rate is considerably lower than any
other TLG in market. After Hi-Level’s 23+ years of
experience in TLG business, ‘Referee PRO’ has been
Hi-Level’s pride for decades. Hi-Level have big
name in gas station owner’s group in South Korea
and the largest share in TLG/ATG/TMS market.
Hi-Level’s TLG is widely renown for its high
durability. Not only being intrinsic safe and
explosion proof, built-in surge protection and top-
notched IP 67 waterproof ensures that ‘Referee
PRO’ won’t fail in toughest environment. It gives
maximum satisfaction for gas station owners.
We have NO HATERS, thanks to our lower
failure rate. Salespeople in TLG business would
know what it means – our product is indeed a
masterpiece and the toughest amongst all TLGs.
This fact goes well beyond Korea, showing the
lowest fail rate in toughest climate such as
Indonesia, Saudi Arabia, Jordan.
Description
Referee PRO
TLG Probe for Gas Station Tank
Hi-Level Co., Ltd. is looking for
Overseas Distributor & Business Partner
for Referee PRO, our main product.
• Magnetostrictive method Liquid level meter
• Measures Fluid and Water level
• 0.1mm Level Accuracy
• Measuring range 4m Max
• Built-in temperature sensor
• ± 0.5℃ Temperature Accuracy
• Alarm for Low level, Overflow, Water
• Automatic/manual stock managing and viewing
• Industrial Flexible type(Max 20m) available
Features
• Hi-Level have 23+ year of experience on TLG
• Korean market share of ‘Referee PRO’ is #1
• Installed 2,436 sites in Korea (More than 50%)
• A few site NEVER suffered an error for 15 years
• Version is now 35th and it is continuously evolving
• Currently exporting to Indonesia, Iran, Jordan,
Saudi Arabia, Vietnam, etc.
Interesting Facts
DM - 1000
LCD Monitor
[ Referee PRO]
PROBE for
Gas Station
[ Referee PRO - S ]
Probe with
Relative Density sensor
< Product Family > < Features >
< Value - added >
OVER
[ Referee OST ]
For large storage tank
[ Referee PRO - S ]
Fake fuel detect feature
Level & Height
Measurement
Temperature
measurement
Water level
measurement
Temperature - corrected
NET Volume calculation
< Alerts >
Automatic mode
when receiving stock
Select LCD / PC
Track minor stock change
EVEN for 1 Liter
Easy inventory
checking
High /
Overflow
Low /
Empty
Moisture /
Water
[ Referee OST ]
Flexible type probe
In - app
Remote desktop support

6. Test result
* Level, Temp, Specific Density
Referee PRO : TLG Probe for Gas Station Tank
Attribute Specification
Sensing Type Magnetostrictive level meter
Applicable fluids Fuel, Water, Chemicals, etc.
Level Range 4,000mm MAX
Level Accuracy 0.1 mm
Pipe material SUS 304
Floater material NBR
Endurable Pressure 30kgf/m2
Weight 0.5 Kg/m
Communication
Wired : RS485
Wireless : Bluetooth, Zigbee
Temperature Range -20℃ ~ 70℃
Temperature Accuracy 0.5℃
Power Consumption
Standby : 30uA at 8V
Active : 1~20mA at 8V
Explosion-proof grade
KCs Ex Ia IIB T4
(Intrinsic Safety)
PCU (Power Control Unit)
Probe
LCD Display
Attribute Specification
Input ports RS232, RS485, Bluetooth, Zigbee
Output ports RS485 (16 units)
Weight 1.0 Kg
Dimensions 300(L) X 270(W) X 70 (H) mm
Power supply AC 90 ~ 250(V), 50 ~ 60 Hz, 30W
Attribute Specification
Screen 7“ TFT LED, 800 X 400 24 Bit
Input device Touch screen
Printer Thermal printer
Weight 1.5 Kg
Dimensions 245(L) X 180(W) X 100 (H) mm
Power supply AC 90 ~ 250(V), 50 ~ 60 Hz, 30W
Specification
1. Housing with PCB – AL6061
2. Connection pipe – SUS316
3. Fluid level floater – NBR with magnet
4. Water level floater – NBR with magnet
5. Stopper – SUS316
1
2
Display Type
3
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5
Certification
Explosion-proof
HQ & Factory : 72-35 GongHang-ro, 1347 Beon-gil, GangSeo-gu, Busan, South Korea
Seoul Office : #12F, 216 Teheran-ro , Gangnam-gu, Seoul, South Korea
T. +82-51-502-3399 F. +82-51-338-4799 E. hi-level@naver.com
www.hilevel.co.kr
T r u s t w o r t h y & I n n o v a t i v e
All copyright reserved to Hi-Level Co., Ltd.
[VER]HiCaPa/MAIN_v5_1/EN/181101

7. TankMon
Smart Inventory Management
TankMon
Smart & Convenient
Remote Fuel Inventory
Management App
Info : tankmon.hilevel.co.kr
R e a l - t i m e
I n v e n t o r y
M o n i t o r i n g
I n v e n t o r y h i s t o r y
B y t a n k s / f u e l t y p e s

8. TankMon : Smart Inventory Management
HQ & Factory : 72-35 GongHang-ro, 1347 Beon-gil, GangSeo-gu, Busan, South Korea
Seoul Office : #12F, 216 Teheran-ro , Gangnam-gu, Seoul, South Korea
T. +82-51-502-3399 F. +82-51-338-4799 E. hi-level@naver.com
www.hilevel.co.kr
T r u s t w o r t h y & I n n o v a t i v e
All copyright reserved to Hi-Level Co., Ltd.
• Real time inventory monitoring
• View inventory history by tank / fuel types
• Monitor PC client status with mobile
• Multi-platform (Mobile app, Web, Mobile app)
• Support feature for multiple gas stations owner
• Gas station info sharing between users
• Easy remote access support feature
Features
Web App : mon.hilevel.co.kr