HITROL HR-30 User manual

HR-30 Series
HITROL CO., LTD. 1
Doc. no.: HR30_IM_Eng_Rev.8.9
Issue date: 2021. 01
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-30 Series

HR-30 Series
HITROL CO., LTD. 2
You should be careful where CAUTION is marked to carry
out the work.
You should be well-informed of the contents where
WARNING is marked before carrying out the work.
.
You should be aware of where NOTICE is marked to carry
out the work.
Table of Contents
Overview ·································································· 3
Operation Principle ················································ 3
Characteristics ····························································· 3
Specifications ····························································· 4
Stainless Steel (Flange) ······················································· 4
Stainless Steel (Screw) ························································ 4
PVC ······························································································ 4
TEFLON ······················································································ 5
Specifications Applied to the Float ·························· 5
Contact Point Capacity ·········································· 6
SPST ····························································································· 6
SPDT ···························································································· 6
Latching Switch ······································································ 6
Contact Form ·························································· 6
Minimum Section Distance ············································ 7
Stainless Steel ········································································· 7
PVC ······························································································ 7
TEFLON ······················································································ 7
Float Application Table ········································· 8
Product Composition ············································ 9
Dimensions ····························································· 10
Weather-proof ······································································ 10
Ex-proof ··················································································· 11
Maintenance ···························································· 12
Precautions for Removal ········································ 12
Precautions for Installation ···································· 12
Precautions for Inserted External Wire ······················ 12
Precautions for Grounding······································· 13
Precautions for Attachment ····································· 13
Wiring ···································································· 14
Matters regarding Operation and Use ····················· 14
Safety and Environment ·········································· 15
Marking ································································· 15
User Training ························································ 16
Warranty and Contact ········································ 16

HR-30 Series
HITROL CO., LTD. 3
Overview
Operation
Principle
Characteristics
HR-30 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, including those in
chemical factories, which are highly oxidative and corrosive. Also, it can be widely used in
general industries with high reliability and long life spans.
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.
 Widely used to measure various liquid
 Applicable to corrosive and acidic liquids with anti-corrosive material for the sensor (PVC, Teflon)
 Applicable to explosion area (Ex-proof Version)
 Long life cycle
 Strong structure and high reliability

HR-30 Series
HITROL CO., LTD. 4
Specifications Stainless Steel (Flange)
Model HR-30S HR-30SH HR-30S-Ex HR-30SH-Ex
Mounting Flange
Temperature Max. 80℃ Max. 150℃ Max. 80℃ Max. 150℃
Process pressure Up to 20㎏/㎠(300#)
Switch type Reed switch
Contact form SPST, SPDT
Enclosure Weather-proof, IP65 Ex-proof (Ex d IIC T6, IP65)
Wetted part material SUS304, SUS316L
Process connection 80A JIS 10K
Housing ; Cable entry P.C ; PF 3/4”(F) AL. ; PF 3/4”(F)
Combination unit HLC-200A, HLC-300N, or HLC-400
Stainless Steel (Screw)
Model HR-30C HR-30CH HR-30C-Ex HR-30CH-Ex
Mounting Screw
Temperature Max. 80℃ Max. 150℃ Max. 80℃ Max. 150℃
Process pressure Up to 20㎏/㎠(300#)
Switch type Reed switch
Contact form SPST, SPDT
Enclosure Weather-proof, IP65 Ex-proof (Ex d IIC T6, IP65)
Wetted part material SUS304, SUS316L
Process connection PT 2”(M)
Housing ; Cable entry P.C ; PF 3/4”(F) AL. ; PF 3/4”(F)
Combination unit HLC-200A, HLC-300N, or HLC-400
PVC
Model HR-30V HR-30V-Ex
Mounting Flange
Temperature Max. 60℃
Process pressure Up to 0.5㎏/㎠
Switch type Reed switch
Contact form SPST, SPDT
Enclosure Weather-proof, IP65 Ex-proof (Ex d IIC T6, IP65)
Wetted part material PVC
Process connection 80A JIS 10K
Housing ; Cable entry P.C ; PF 3/4”(F) AL. ; PF 3/4”(F)
Combination unit HLC-200A, HLC-300N, or HLC-400

HR-30 Series
HITROL CO., LTD. 5
It is recommended that the HR-30 Series work with our Combination unit.
The application specification may vary depending on the specific measurement
and the specific gravity.
Specifications
Applied to
the Float
TEFLON
Model HR-30T HR-30TH HR-30T-Ex HR-30TH-Ex
Mounting Flange
Temperature Max. 80℃ Max. 150℃ Max. 80℃ Max. 150℃
Process pressure Up to 0.5~3㎏/㎠
Switch type Reed switch
Contact form SPST, SPDT
Enclosure Weather-proof, IP65 Ex-proof(Ex d IIC T6, IP65)
Wetted part material SUS304 + TEFLON, SUS316L + TEFLON
Process connection 80A JIS 10K
Housing ; Cable entry P.C ; PF 3/4”(F) AL. ; PF 3/4”(F)
Combination unit HLC-200A, HLC-300N, or HLC-400
Float Environment
Temp. (℃) Press. (㎏/㎠) Acid Alkaline Oil Solvent Liquid gas
SUS316L -20 ~ +150 Up to 20 △ ○ ○ ◎ △
PVC -10 ~ +60 0.5 ○ ○ Ⅹ △ Ⅹ
TEFLON -20 ~ +150 Up to 0.5~3 ◎ ◎ Ⅹ ○ △
NBR -48 ~ +60 Up to 20 Ⅹ △ ◎ △ ○
TITANIUM -20 ~ +150 Up to 10 Ⅹ △ ◎ △ ○
Note: ◎ – Excellent, ○ – Good, △- Acceptable, Ⅹ- Not good

HR-30 Series
HITROL CO., LTD. 6
Contact
Point
Capacity
Contact
Form
SPST
Float Enclosure Max. Switch Voltage Max. Switch Current
1” Weather-proof DC 24V 0.5A
Ex-proof
2”, 3”, 4” Weather-proof AC 250V / DC 24V 1A/0.5A
Ex-proof AC 110V / DC 24V
SPDT
Float Enclosure Max. Switch Voltage Max. Switch Current
1”, 2” Weather-proof DC 24V 0.2A
Ex-proof
3”, 4” Weather-proof AC 250V / DC 24V 1A/0.5A
Ex-proof AC 110V / DC 24V
Latching Switch
Float Enclosure Max. Switch Voltage Max. Switch Current
1”, 2” Weather-proof DC 24V 0.2A
Ex-proof
3”, 4” Weather-proof AC 250V / DC 24V 1A/0.5A
Ex-proof AC 110V / DC 24V
Float Max. Contact form
1” 4-SPST 2-SPDT
2” 6-SPST 3-SPDT
3” 6-SPST 4-SPDT
4” 6-SPST 4-SPDT

HR-30 Series
HITROL CO., LTD. 7
Minimum
Section Distance Stainless Steel
Standard Type Float Size
1” 2” 3” 4”
Section A(mm) 40 50 100 100
Section B(mm) 55 80 160 170
Section C(mm) 40(100) 50(100) 100 100
Latching Type Float Size
1” 2” 3” 4”
Section D(mm) 20
PVC
Standard Type Float Size
2” 3” 4”
Section A(mm) 100 100 100
Section B(mm) 150 150 150
Section C(mm) 100 100 100
Latching Type Float Size
2” 3” 4”
Section D(mm) 20
TEFLON
Standard Type Float Size
1” 2” 3” 4”
Section A(mm) 40 50 100 100
Section B(mm) 55(120) 80(120) 180 180
Section C(mm) 40(100) 50(100) 100 100
Latching Type Float Size
1” 2” 3” 4”
Section D(mm) 20
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
D = Minimum distance between two setting points for detecting by one float
( ) = Minimum distance between two setting points for A/B alarm (@Section B)
Lower Dead Band for latching type (@Section C)

HR-30 Series
HITROL CO., LTD. 8
Float
Application
Table
Product Size Dimensions(mm) Guide
Tube
Material (*)S.G Range
D H A
HR-30S
HR-30C
1”
Ø28 28 Ø9.5 Ø8 316L 0.9~1.4
Ø26 15 Ø9.5 Ø8 Foam NBR 0.8~1.3
2”
Ø49 50 Ø15.5 Ø12.7 316L 0.7~1.0
Ø50 45 Ø20 Ø15.8 Foam NBR 0.6~0.9
Ø45 52 Ø15 Ø12.7 316L 0.7~11
HR-30S
3”
Ø73 105 Ø23.5 Ø21.7 316L 1.0~1.5
Ø73 108 Ø23 Ø21.7 Titanium 0.6~0.9
Ø65 90 Ø25 Ø21.7 316L 0.9~1.5
4”
Ø95 119 Ø30 Ø25.4 316L 0.8~1.3
Ø95 103 Ø23 Ø21.7 Titanium 0.6~0.8
Ø95 118 Ø23 Ø21.7 Titanium 0.5~0.6
Ø80 80 Ø28 Ø25.4 Foam NBR 0.5~0.7
Product Size Dimensions(mm) Guide
Tube
Material (*)S.G Range
D H A
HR-30V
2” Ø49 105 Ø20 Ø18
PVC
1.2~1.7
3”
Ø76 110 Ø31.5 Ø26 1.0~1.6
4”
Product Size
Dimensions(mm) Guide
Tube
Material (*)S.G Range
D H A
HR-30T
1”
Ø26 30 Ø10.5 Ø10 TEFLON 1.1~1.7
Ø28 35 Ø11 Ø10 TEFLON 1.1~1.7
Ø28 30 Ø11 Ø10 PP 1.0~1.7
2” Ø45 50 Ø17 Ø15 TEFLON
0.9~1.6
1.1~1.7
3&4” Ø69 96 Ø23.5 Ø21 TEFLON
0.8~1.3
0.9~1.5
4” Ø85 100 Ø33 Ø28 TEFLON 1.1~1.7
(*)S.G: Specific Gravity

HR-30 Series
HITROL CO., LTD. 9
Product Composition
Aluminum Housing Aluminum Housing
Max. 80℃ Max. 80℃ Max. 150℃ Max. 80℃ Max. 150℃
Flange
304, 316L
Flange
304, 316L
Flange
PVC
Flange
304, 316L w/ TEFLON
Polycarbonate Housing
Screw
Flange
Guide Pipe
316L
Float
316L
Stopper
316L
Stopper
316L
Protection
Pipe
304, 316L
Float
316L
Float
PVC
Float
Teflon
Guide Pipe
316L+PVC
Guide Pipe
316L w/
Teflon
Stopper
PVC
Stopper
Teflon

Dimensions Weather-proof
HR
-
HITROL CO., LTD.
-
30S HR-30V
HR-30SH HR-30TH
HR-30 Series
10
HR-30T

Ex-proof
HR-
30S
HITROL CO., LTD.
30S
-Ex HR-30V-Ex
HR-30SH-Ex HR-30TH-Ex
HR-30 Series
11
HR-30T-Ex

HR-30 Series
HITROL CO., LTD. 12
The major parts of HR-30 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~E4,
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 0Ω by moving the float,
it is normal to the N.C (Normal Close), and the N.O (Normal Open) indicates infinite.
- 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.
- If there is explosive gas atmosphere, do not open the cover.
- Unlock the lock key (Set screw) before removing the cover. (Ex-proof)
- Make sure that any O-ring or gasket is not damaged while opening or closing the cover of product.
- Use the same standard flange or screw.
- Make sure to insert washers between bolts and nuts to prevent loosening.
- When you attach the product to a hopper, make sure that it is as bonded as possible by means of tools.
- Make sure to insert gaskets between flanges. (Select the gaskets in consideration of
temperature of content and pressure of vessel.)
- Install an Ex-proof product only in an Ex-proof zone.
- After the installation is complete and the cover of the product is assembled, power it on.
- Use the cable gland connection or metal pipe line lead-
in on the wire inlet, and use a
product with equivalent Ex-proof certificate to connect it with the external line lead-
in
method.
- For non-use external wire inlet, use a closed plug that passe
s safety certificate above
equivalent performance with the product.
Please turn off the power of the product for maintenance.
Please do not apply high impact to the product.
Maintenance
Precautions
for Removal
Precautions
for
Installation
Precautions
for Inserted
External Wire
(Ex-proof)

HR-30 Series
HITROL CO., LTD. 13
- The grounding has an external and an internal grounding. When connecting to an external ground,
the ground wire shall be 4㎟ (4mmSQ).
-
The internal grounding wire shall be the same size as the power line, and the size of the
internal grounding terminal lug shall be 3.1㎟ (3.1mmSQ). If the power line is larger
than
3.1㎟, connect the ground wire without terminal lug.
Below recommendation shall be considered when installation.
Make sure to insert a washer if the terminal lug is removed from ground
terminal and then re- connected. (Loosening prevention)
Precautions
for
Grounding
(Ex-proof)
Precautions
for
Attachment
Product shall be installed at the place far
from inlet in order to avoid the malfunction.
Protection tube shall be applied if there is a
flow or slopping of the medium in the tank.
Bracket shall be installed with the product
when the installation on the concrete as per
above figure.
Inner diameter “d” of tank nozzle shall be
larger than the outer diameter of float as per
above figure.

HR-30 Series
HITROL CO., LTD. 14
The terminals of the products are composed according to contact points and shall be connected as follows.
- Open the cover and insert the cable through the wire inlet.
- Identify the contact points (E1, E2 …) on the terminal block and connect the cable.

Contact Form
notation
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.
Wiring
Matters
regarding
Operation
and Use
Weather-Proof
Ex-Proof
SPST 1F ~ 2F SPST 3F ~ 5F SPST 6F
SPDT 1F SPDT 2F SPDT 3F ~ 4F
Ex) 3-SPST A Contact order indication
Ex) 3-SPDT order indication
Contact with A (OFF)
Contact with A (ON)
Contact with B (OFF)
Contact with B (ON)

HR-30 Series
HITROL CO., LTD. 15
Please do not move the stopper holding the float at random.
■ 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.
The fluid temperature of the container shall be up to 80℃ for Weather-proof type. For high
temperature, the fluid temperature shall not exceed 150℃ and the surface temperature of the
product installed in the container shall not exceed 85℃(T6 grade).
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℃.)
An Ex-proof product is a pressure-resistant and Ex-proof type, so never open the cover during operation.
Ex-proof products are designed according to Article 34 of the Industrial Safety and Health Act
and Article 58.4 of the Enforcement Rules of the same Act.
■ Precautions for Use
- Make sure to connect the product and vessel using required tools for sure.
- Keep the lock key safe and make sure that it is locked.
- Do not apply high impact to the product.
■ Precautions for Wiring
- Make sure to wire contacts correctly (refer to Wiring)
- Internal ground (inside product housing) and external ground shall be connected.
- 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.
<Weather-proof> <Ex-proof>
Safety and
Environment
Marking
User
Training
■NO
□NC
□NO
■NC
Switch ON, when the level
rises. (Contact with A)
Switch ON, when the level
drops. (Contact with B)

HR-30 Series
HITROL CO., LTD. 16
■ 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)
Do not apply the Non Ex-proof product in an Ex-proof zone.
The Ex-proof product can be used where the environment and liquid inside the containers
are of zone 1 and 2
Warranty
and
Contact