HITROL HR-10 Series User manual

HR-10 Series
HITROL CO., LTD. 1
Doc. no.: HR10_IM_Eng_Rev.1
Issue date: 2022. 02
HITROL CO., LTD.
HEAD OFFICE.FACTORY.R&D INSTITUDE
HITROL CO., LTD 141, Palhakgol-gil, Jori-eup
Paju-si, Gyeonggi-do, Korea
TEL. : [phone]
FAX. : [phone]
www.hitrol.com
INSTRUCTION MANUAL
FLOAT TYPE LEVEL SWITCH
HR-10 Series

HR-10 Series
HITROL CO., LTD. 2
You should be careful where CAUTION is
marked to carry out the work.
You should be aware of where NOTICE is
marked to carry out the work.
You should be well-informed of the contents
where WARNING is marked before carrying
out the work.
Table of contents
Overview ······························3
Operating Principle ·······················3
Characteristics ··························3
Specifications ···························4
Minimum Section Distance ················4
Dimensions ····························5
Wiring ·······························6
Matters Regarding Operating and Use ········6
Maintenance ···························7
Precautions for Removal ··················7
Precautions for Installation ················7
Safety and Environment ··················8
Marking ·······························8
User Training ···························8
Warranty and Contact ····················8

HR-10 Series
HITROL CO., LTD. 3
Overview
HR-10 Series is a Float Type Level Switch which is basically operated with the usage of
reed switch and magnet. It can be applied to various storage containers. Also, it can be
widely used in general industries with high reliability and long life span.
Operating
Principle
As liquid level is changed in the tank, the float which is manufactured in accordance with
the specific gravity of liquid moves upward or downward along the guide pipe with the
same liquid level by buoyancy. The built-in magnet in the float activates reed switch
which is located in the guide pipe and contact signal is out. Each alarm or H/L control
with multiple setting points is available.
Characteristics
Widely used to measure various liquid
Applicable to small tank
Long life cycle
Strong structure and high reliability
Easy Installation
HEAD
CONNECTION
GUIDE TUBE
STOPPER
FLOAT

HR-10 Series
HITROL CO., LTD. 4
Specifications
Model
HR-10S
HR-10T
Mounting
Screw, Flange
Temperature
Max. 80℃
Max. 60℃
Process Pressure
Up to 20kg/cm2(300#)
0.5kg/cm2
Ambient Temperature
-20℃~ +60℃
Switch Type
Reed S/W
Switch Form
SPST(Std.), SPDT(Opt.)
Enclosure
Weather-Proof
Wetted Part Material
316L SS
PVC, PP(Float)
Process Connection
PT 1”Screw
PT 1-1/2”Screw
Housing
PA66(Std.), AL(Opt.)
PC(Std.), AL(Opt.)
Cable Entry
PG7(Std.)
PF 3/4”(F)(Std.)
Contact From
SPST, SPDT
SPST
Max. Contact From
1-SPST, 2-SPST, 1-SPDT
1-SPST
Contact Rating
24VDC / 0.5A / 10W (SPST)
24VDC / 0.25A / 5W (SPDT)
24VDC / 0.28A / 10W (SPST)
Minimum Section
Distance
Standard Type
Float Size
1”
Section A(mm)
40
Section B(mm)
55
Section C(mm)
40(100)
A = Upper Dead Band; Minimum length which cannot be measured from the
bottom of flange
B = Minimum distance between two setting points
C = Lower Dead Band; Minimum length which cannot be measured from the
end of guide pipe
( ) = Latching Type; Minimum distance between two setting points for detecting by
one float; Minimum distance = 20mm

HR-10 Series
HITROL CO., LTD. 5
Dimensions
<WEATHER-PROOF Version>
HR-10S-1F (PA66)
HR-10S-1F (AL)
HR-10T (P.C)
HR-10S-2F (PA66)
HR-10S-2F (AL)

HR-10 Series
HITROL CO., LTD. 6
Please do not move the stopper holding the float at random.
Wiring
The terminals of the products are composed according to contact points and shall be
connected as follows.
HR-10S (PA66)
1 : E1
2 : E2
3 : Com
G : Ground
HR-10S (AL)
A : E1
B : E2
C : Com
HR-10T (P.C)
Com : Com
E1 : E1
Matters
Regarding
Operation and
Use
The product can be manufactured to N.O (Contact with A)/N.C (Contact with B) on orders
from customers, and if there are no specific requirements for them, it can be manufactured to
N.O (Contact with A). The shape of the contacts is shown below.
Contact A (OFF)
Contact A (ON)
Contact B (OFF)
Contact B (ON)
■NO
□NC
□NO
■NC
Switch ON, when the level
rises. (Contact with A)
Switch ON, when the level
drops. (Contact with B)

HR-10 Series
HITROL CO., LTD. 7
Please turn off the power of the product for maintenance.
Please do not apply high impact to the product.
Maintenance
The major parts of HR-10 Series to be inspected are float and reed switch.
The life span of key parts depends on user’s environment and can be used optimally through
periodic check. Therefore, regular inspection ensures optimal performance of product, so take
regular inspection and maintenance at least every year. In addition, check for the exterior of
the product like visual damage. If there is scale caused by measurements, it shall be removed
for the smooth operation of the float. Reed switch can simply be inspected using a Digital
Multimeter as follow.
-Select the buzzer of the Digital Multimeter and connect it to one of product’s terminal
blocks, E1/E2 or N.O/N.C and the COM terminal.
-If the buzzer rings when the float reaches the upper/lower contact points, it works normally.
-If the contact state is checked by resistance, the Digital Multimeter indicates 0Ωby moving
the float, it is normal to the N.C (Normal Close), and the N.O (Normal Open) indicates
infinite.
Precautions
for Removal
- Check the level and presence of measurements in the tank before removing it.
- Wear gloves when removing it, to prevent a burn.
- Disassemble work shall be done with the power off.
- Make sure that any O-ring or gasket is not damaged while opening or closing the cover of product.
Precautions
for Installation
- Use the same standard flange or screw.
- Make sure to insert washers between bolts and nuts to prevent loosening.
- Make sure to insert gaskets between flanges. (Select the gaskets in consideration of
temperature of content and pressure of vessel.)
- After the installation is complete and the cover of the product is assembled, power it on.
Float
316L
Float
316L
Float
PVC
Float
PTFE

HR-10 Series
HITROL CO., LTD. 8
Safety and
Environment
■Precautions for Use
- Make sure to connect the product and vessel using required tools for sure.
- Do not apply high impact to the product.
■Precautions for Wiring
- Make sure to wire contacts correctly (refer to Wiring)
- Pay attention to prevent electric shock.
■Disposal of Product
- Make sure to separate the amplifier and main unit from housing before disposing
the products. Also, the amplifier shall be detached and discard the metal and non-
metallic materials. No part (ex. Mercury switch) has influence on the environment,
so no special attention is required.
Marking
■Product Identification
- The product identification mark is attached onto the housing and shows the model
name, serial number, working temperature, working pressure, and matters regarding
output. The serial number is a unique manufacturing number for the identification of
products.
User Training
The fluid temperature of the container shall be up to 80℃for Weather-proof type. In
addition, make sure that the ambient temperature of housing is kept at -20℃~ +60℃.
(However, product with PVC sensor part, the fluid temperature of the container is limited
to 60℃.)
Warranty and
Contact
■Warranty and Service
This product is subject to the warranty for 2 years of shipment and unpaid service will be
provided for any damage found under normal operating conditions. If it is not about the
failure of product, the service charge will be payable.
You can request A/S at our website or by contacting our headquarters.
■Headquarters ․Factory ․Laboratory Contact Number
ADRESS : HITROL CO., LTD 141, Palhakgol-gil, Jori-eup, Paju-si, Gyeonggi-do, Korea
T E L : 031-950-9700 (Headquarters & A/S)
F A X : 031-943-5600 (Headquarters & A/S)