KEYENCE FR Series Radar Type Level Sensor

Short-range type with built-in display (FR-S01)

Instruction Manual

Symbols

DANGER: Indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING: Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION: Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE: Indicates a situation which, if not avoided, could result in product damage as well as property damage.

Important: Indicates cautions and limitations that must be followed during operation.

Point: Indicates additional information on proper operation.

Reference: Indicates tips for better understanding or useful information.

Safety Precautions

General Precautions

DANGER:

WARNING:

Precautions on Media

NOTICE: Measured values may exceed the upper limit if conductive components in the target medium adhere to the bottom of the main unit. In this case, clean the bottom of the main unit to remove the adhered substances.

Precautions on Handling

CAUTION:

Precautions on Installation

CAUTION:

NOTICE: During installation, take the following into account to improve the noise immunity. Otherwise, a malfunction may occur.

Power supply:

Precautions on Regulations and Standards

CE and UKCA marking

Keyence Corporation has confirmed that this product complies with the essential requirements of the applicable EU Directive(s) and UK regulations, based on the following specifications. Be sure to consider the following specifications when using this product in the Member States of European Union and in the United Kingdom.

Precautions on radio communication

The FR Series uses the 60 GHz band.

Radio frequency interference slowing or even preventing measurement may occur if this product is used in the vicinity of equipment that uses the same frequency band such as wireless LAN equipment, microwaves, factory-use heaters, and high-frequency medical equipment.

KEYENCE declares that the FR-S(H)01(C)/LS20(L)/LM(H)20(L)/LP(H)20(L) complies with Radio Equipment Directive 2014/53/EU. The entirety of this declaration of conformity with this EU directive is available at the following Internet address: www.keyence.com/cedoc

Korean text: 이 기기는 업무용 환경에서 사용할 목적으로 적합성평가를 받은 기기로서 가정용 환경에서 사용하는 경우 전파간섭의 우려가 있습니다. 본 기기는 통상 이용 상태의 경우 인체(머리, 몸통)와 20cm 초과하는 거리에서 사용되어야 합니다.

Precautions on radio communication (FR-S(H)01(C)/LS20L/LM(H)20L/LP(H)20L)

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

FCC CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment and meets the FCC radio frequency (RF) Exposure Guidelines. This equipment should be installed and operated keeping the radiator at least 20cm or more away from person's body.

This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada's licence-exempt RSS(s). Operation is subject to the following two conditions: 1. This device may not cause interference. 2. This device must accept any interference, including interference that may cause undesired operation.

French text: L'émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d'Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : 1. L'appareil ne doit pas produire de brouillage; 2. L'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

This equipment complies with ISED radiation exposure limits set forth for an uncontrolled environment and meets RSS-102 of the ISED radio frequency (RF) Exposure rules. This equipment should be installed and operated keeping the radiator at least 20cm or more away from person's body.

French text: Cet équipement est conforme aux limites d'exposition aux rayonnements énoncées pour un environnement non contrôlé et respecte les règles d'exposition aux fréquences radioélectriques (RF) CNR-102 de l'ISDE. Cet équipement doit être installé et utilisé en gardant une distance de 20 cm ou plus entre le radiateur et le corps humain.

Chinese text: 取得審驗證明之低功率射頻器材,非經核准,公司、商號或使用者均不得擅自變更頻率、加大功率或變更原設計之特性及功能. 低功率射頻器材之使用不得影響飛航安全及干擾合法通信;經發現有干擾現象時,應立即停用,並改善至無干擾時方得繼續使用. 前述合法通信,指依電信管理法規定作業之無線電通信. 低功率射頻器材須忍受合法通信或工業、科學及醫療用電波輻射性電機設備之干擾.

Packaged Items

System Configuration Example and Name of Each Component

Short-range type with built-in display

Diagram Description: A diagram shows the FR Series sensor with its components labeled. These include the power cable connector (M12 male), ring indicator, display, MODE button, manual adjustment button, case (rotatable up to 330°), and mounting thread (G3/4).

Note: The ring indicator lights in red, yellow, or green depending on the "Indicator pattern" setting.

Note: The manual adjustment button is used to fine-tune the set value.

Product Overview

The FR Series allows you to specify the distance from the reference surface of the sensor to the bottom of the tank (0%) and the distance from the reference surface of the sensor to the top surface of the tank (100%). With these values specified, the sensor displays the level of the liquid/powder from the bottom of the tank.

Example: The FR Series is mounted 100 mm above the top surface of a tank whose height (the position at which the tank is filled to 100% capacity) is 1000 mm.

Diagram Description: A tank view illustrates the relationship between the sensor's reference surface, the tank bottom (0%), and the tank top surface (100%). It shows how the sensor measures the distance to the bottom (e.g., 1100 mm) and the distance to the top (e.g., 100 mm), corresponding to percentage displays (0%, 10%) and analog outputs (4 mA, 5.6 mA).

Note: When using an oil-based liquid (low specific conductive capacity), you can select [Oily Liquid] for "Detection target" to automatically mask the area close to the bottom of the tank, preventing false detections of the bottom of the tank. The current value display shows "---" in the masked area. For details on the masking function, see the user's manual.

Diagram Description: Another tank view shows the effect of the [Oily Liquid] setting, with a masked area near the bottom. It displays corresponding percentage values (0%, 10%) and analog outputs (4 mA, 5.6 mA).

Installation and Mounting

Mounting the sensor

Mounting on the flange nozzle

  1. Fit a gasket (included with the flange mounting bracket) on the flange mounting bracket, and then mount the sensor on the flange mounting bracket. Recommended tightening torque: 30 N-m
  2. Insert a flange gasket between the flange mounting bracket and the flange nozzle, and then use bolts and nuts to secure the parts. (A gasket is not required if an airtight seal is not required.)

Diagram Description: Illustrates mounting the sensor on a flange nozzle using a flange mounting bracket, gasket, flange gasket, bolts, and nuts.

Mounting directly on a top panel (using a general mounting bracket, not a nut)

  1. Insert the threads of the sensor into a general mounting bracket. Recommended tightening torque: 30 N·m
  2. Drill a hole with a diameter of 40 mm in the top panel, and then use screws to secure the general mounting bracket on this panel.

Diagram Description: Shows mounting the sensor on a top panel using a general mounting bracket and screws.

Mounting directly on a top panel (mounting with a nut)

  1. Drill a hole with a diameter of 27 mm in the top panel.
  2. Fit a gasket on the threads of the sensor, and then insert the threads in the hole in the top panel.
  3. Attach a nut from the bottom of the top panel. Recommended tightening torque: 30 N-m (A gasket is not required if an airtight seal is not required.)

Diagram Description: Depicts mounting the sensor on a top panel using a gasket and a nut.

Mounting directly on a top panel (screwing in the device)

  1. Drill a G3/4 screw hole in the top panel.
  2. Fit a gasket on the threads of the sensor, and then insert this mounting screw in the hole in the top panel. Recommended tightening torque: 30 N·m (A gasket is not required if an airtight seal is not required.)

Diagram Description: Shows screwing the sensor directly into a top panel using a gasket.

Mounting on an inner wall

  1. Mount a side mounting bracket on a wall with M6 screws.
  2. Insert the sensor into the bracket, and then attach a nut from the bottom of the bracket. Recommended tightening torque: 30 N-m

Diagram Description: Illustrates mounting the sensor on an inner wall using a side mounting bracket and screws.

Clamping to the tank wall

  1. Attach the clamp of the mounting bracket to the tank wall, and then turn the screw to tighten the clamp.
  2. Insert the sensor into the clamp mounting bracket, and then attach a nut from the bottom of the bracket. Recommended tightening torque: 30 N-m
  3. Loosen the socket head cap screw (width between two surfaces: 4 mm) on the adjuster to rotate the bracket. Tighten this screw again after adjusting the bracket to the desired angle. Recommended tightening torque: 3.5 N-m

Diagram Description: Shows clamping the sensor to a tank wall using a clamp mounting bracket, adjuster, and nut.

Adjustable mounting

  1. Mount the threaded bolt of an adjustable mounting bracket on the inner wall of a tank or similar object. (Recommended tightening torque: 24.5 N-m)
  2. Insert the sensor into the hole of the adjustable mounting bracket, and then attach a nut from the bottom of the bracket. Recommended tightening torque: 30 N-m
  3. Loosen the socket head cap screw (width between two surfaces: 4 mm) on the adjuster to rotate the bracket. Tighten this screw again after adjusting the bracket to the desired angle. Recommended tightening torque: 3.5 N-m

Diagram Description: Depicts adjustable mounting of the sensor using an adjustable mounting bracket.

Offset mounting

  1. Drill a hole with a diameter of 50 mm and four M6 screw holes in the top panel.
  2. Mount an offset mounting bracket to the top panel of the tank with M6 screws.
  3. Mount the sensor on the offset mounting bracket. Recommended tightening torque: 30 N-m

Diagram Description: Shows offset mounting of the sensor using an offset mounting bracket.

NOTICE: If the liquid surface or bubbles reach the undetectable area, you can stabilize detection by mounting the offset mounting bracket at further distance from the liquid surface or bubbles.

Mounting on a ferrule

  1. Mount a gasket on the ferrule mounting bracket, and then mount this bracket on the sensor.
  2. Mount the ferrule gasket on the ferrule.
  3. Use a clamp to mount the sensor on the ferrule.

Diagram Description: Illustrates mounting the sensor on a ferrule using a ferrule mounting bracket, gasket, ferrule gasket, and clamp.

Recommended installation conditions

The FR Series beam widens as follows. Ensure there are no metal obstacles in the following range.

Diagram Description: A graph shows beam widening in meters against measuring distance in meters for oil-based liquid/powder and water-soluble liquid. It also notes that a metal wall with a smooth surface (depressions and protrusions shorter than 2.5 mm) is acceptable if it is within the range.

Note: Detection may be unstable at close distances. It is recommended to install the sensor so that its reference surface is, at a minimum, at the following distances from the highest expected liquid level:

Initial Setting at First Startup

When the sensor is turned on for the first time, configure the following initial settings. Select parameters with the UP and DOWN keys and use the MODE key to confirm entries. After you confirm all the parameters on one screen, you will move to the next one. To return to the previous screen, hold down the MODE key and press the UP key.

Language

Available languages: ENGLISH, 日本語, 中文, DEUTSCH

Distance to bottom

Enter the distance from the reference surface of the sensor to the bottom of the tank. For the position of the reference surface of the sensor when using a mounting bracket, see the dimensions provided in, for example, the catalog. The position indicated as the tank bottom is 0% in the % display.

Diagram Description: Shows the sensor's reference surface, tank bottom (0%), and tank top (100%) with distances indicated.

Distance to top surface

Enter the distance from the reference surface of the sensor to the top surface of the tank. This position is 100% in the % display.

Diagram Description: Illustrates the sensor's reference surface and the distance to the top surface of the tank (100%).

Basic Operation

Current value screen

Diagram Description: Shows the current value screen with displays for current value (e.g., 837), % display (e.g., 55.8%), output indicators (orange lights for active outputs), color bar (linked to ring indicator), tank view (indicating current liquid level), and set values (1 to 5). It also shows units like "mm" and "mm/h".

Changing set values

Hold down the MODE key on the current value display to enter the menu, and then select "Change set value." Use the UP and DOWN keys to change the set value, and then confirm the change with the MODE key.

Wiring

Pin layout

Diagram Description: A table shows the pin layout for the power cable connector (8-pin M12 connector) with pin numbers, colors, and descriptions (e.g., White - Analog output, Brown - Power supply (24 VDC), Green - OUT3, Yellow - OUT4, Gray - OUT1, Pink - OUT2, Blue - 0 V, Red - OUT5/IN).

Note: Use an IO-Link-compatible wire when connecting an IO-Link device. Independently insulate any unused input/output wires.

Control output wiring

Diagram Description: Wiring diagrams are provided for NPN and PNP configurations, showing connections for 24V, OUT, and 0V.

Note: Other functions can be assigned to outputs to which control outputs are not assigned. For details on these functions, see the user's manual. Each control output can also be changed to area mode. For details on area mode, see the user's manual.

External input wiring

Diagram Description: Wiring diagrams are provided for NPN and PNP configurations, showing connections for External input and 24V/0V.

Analog output wiring

Diagram Description: A wiring diagram shows the connection for Analog output, including 24V, White (Analog output), and Blue (0V).

Note: It is possible to switch between 4-20 mA and 0-20 mA using settings.

Initial Settings

Diagram Description: A table lists various settings and their options, including Language (ENGLISH, 日本語, 中文, DEUTSCH), PNP/NPN, Control outputs (0-5), External input (OFF, ON), Detection target (Water-soluble liquid, Oily Liquid, Powder), Distance unit (mm, m), Bottom distance (0 to 2000mm), Top Distance (0 to 2000mm), Set value 1-5, Output 1 logic (N.O., N.C.), and Indicator order (Order 1, Order 2, Order 3, Only green, Always Off).

Note: Underlined items are initial values.

Note: The number of selectable indicator orders varies depending on the number of control outputs. Select the indicator pattern from those shown below. To use a different pattern, select Custom. For details on how to set custom order, see the user's manual.

Diagram Description: Shows various indicator patterns (e.g., Order 1, Order 2, Order 3, Only green, Always Off) with corresponding color sequences (e.g., Red, Green, Yellow).

Key lock

This function prevents operation mistakes by locking/disabling key operations to prevent the settings from being easily changed. To require a password when canceling the key lock, set "Key lock method" to "With password." Enabling/disabling the key lock: Hold down the MODE key and the UP key for 3 seconds or more. When "Key lock method" is set to "With password," the password is required when unlocking the keys.

Reference: If the password entered is incorrect, an error will occur, and the normal screen will appear with the key lock still enabled.

Initializing settings

On the current value screen, hold down the MODE key and press the UP key five times to initialize all settings.

Maintenance

Clean deposits and foreign substances on the mounting bracket and the bottom of the sensor as necessary.

Specifications

Item FR-S01
Measurement range*¹ 0 to 1500 mm (0 to 4.9 ft)
Displayable range*¹ 0 to 2000 mm (0 to 6.6 ft)
Specific conductive capacity of target media 2 or more
Resolution 1 mm
Accuracy 3 0 to 0.3 m: ±5 mm
0.3 to 1.5 m: ±1mm
Control output response time 0.4 s, 1.5 s, 4 s (default), 10 s
Material Lens: PTFE
Internal packing: FKM
Entering part: SUS304
Output PPS PBT PAR
Tank pressure -0.1 to 1 MPa
Inside the tank
Case
Connection port G3/4 (20A)
Number of control outputs Max. 5
Control output/alarm output NPN/PNP open collector (switchable), 30 VDC max., 50 mA max. for each output, residual voltage: 1.4 V max. (50 mA max.), N.O./N.C. switchable, IO-Link (Pin 10), External input (Pin 5)
Analog output 0 to 20 mA/4 to 20 mA, maximum load resistance: 260 Ω (Response time: 0.2 s after comparator output determined [90% response])
External input Short circuit current: max. 1.5 mA, input time: min. 500 ms
Network compatibility IO-Link v1.1/COM2
Zero accuracy 1 mm
Resolution ±0.1 mA (zero = 4 mA)
Analog output accuracy ±0.2 mA (F.S. = 20 mA)
F.S. accuracy
Environmental resistance
Ambient temperature -20 to +55°C (no freezing) *4, *5
Ambient humidity Up to 85%RH (no condensation)
Operating coupling temperature -20 to +85°C (no freezing) *4, *5
Vibration resistance 10 to 500 Hz;
Power spectral density: 0.816 G²/Hz; X, Y and Z directions
Shock resistance 100 m/s² (approx. 10 G), 16 ms pulses, 1000 times each for X, Y and Z axes
Enclosure rating IP67
Protection circuit Protection against reverse power connection, output overcurrent, output surge, and reverse output connection
Power voltage 24 VDC+25%/-20% (including ripple, Class 2/LPS)
Current consumption 50 mA max. (at 20 V)/40 mA max. (at 30 V) (excluding load)
Corresponding cable/connector 8-pin M12 connector
UI LCD, ring indicator
Display
Key switches 3 (up, down, and MODE)

Notes on Specifications:

Diagram Description: A graph shows the relationship between ambient temperature and coupling temperature, indicating that selecting "Turns off when no op." for "Screen brightness" on the FR-S01 can alleviate the ambient temperature regulation by 10°C.

WARRANTIES AND DISCLAIMERS

(1) KEYENCE warrants the Products to be free of defects in materials and workmanship for a period of one (1) year from the date of shipment. If any models or samples were shown to Buyer, such models or samples were used merely to illustrate the general type and quality of the Products and not to represent that the Products would necessarily conform to said models or samples. Any Products found to be defective must be shipped to KEYENCE with all shipping costs paid by Buyer or offered to KEYENCE for inspection and examination. Upon examination by KEYENCE, KEYENCE, at its sole option, will refund the purchase price of, or repair or replace at no charge any Products found to be defective. This warranty does not apply to any defects resulting from any action of Buyer, including but not limited to improper installation, improper interfacing, improper repair, unauthorized modification, misapplication and mishandling, such as exposure to excessive current, heat, coldness, moisture, vibration or outdoors air. Components which wear are not warranted.

(2) KEYENCE is pleased to offer suggestions on the use of its various Products. They are only suggestions, and it is Buyer's responsibility to ascertain the fitness of the Products for Buyer's intended use. KEYENCE will not be responsible for any damages that may result from the use of the Products.

(3) The Products and any samples ("Products/Samples") supplied to Buyer are not to be used internally in humans, for human transportation, as safety devices or fail-safe systems, unless their written specifications state otherwise. Should any Products/Samples be used in such a manner or misused in any way, KEYENCE assumes no responsibility, and additionally Buyer will indemnify KEYENCE and hold KEYENCE harmless from any liability or damage whatsoever arising out of any misuse of the Products/Samples.

(4) OTHER THAN AS STATED HEREIN, THE PRODUCTS/SAMPLES ARE PROVIDED WITH NO OTHER WARRANTIES WHATSOEVER. ALL EXPRESS, IMPLIED, AND STATUTORY WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF PROPRIETARY RIGHTS, ARE EXPRESSLY DISCLAIMED.

IN NO EVENT SHALL KEYENCE AND ITS AFFILIATED ENTITIES BE LIABLE TO ANY PERSON OR ENTITY FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, SPECIAL OR CONSEQUENTIAL DAMAGES (INCLUDING, WITHOUT LIMITATION, ANY DAMAGES RESULTING FROM LOSS OF USE, BUSINESS INTERRUPTION, LOSS OF INFORMATION, LOSS OR INACCURACY OF DATA, LOSS OF PROFITS, LOSS OF SAVINGS, THE COST OF PROCUREMENT OF SUBSTITUTED GOODS, SERVICES OR TECHNOLOGIES, OR FOR ANY MATTER ARISING OUT OF OR IN CONNECTION WITH THE USE OR INABILITY TO USE THE PRODUCTS, EVEN IF KEYENCE OR ONE OF ITS AFFILIATED ENTITIES WAS ADVISED OF A POSSIBLE THIRD PARTY'S CLAIM FOR DAMAGES OR ANY OTHER CLAIM AGAINST BUYER. In some jurisdictions, some of the foregoing warranty disclaimers or damage limitations may not apply.

BUYER'S TRANSFER OBLIGATIONS:

If the Products/Samples purchased by Buyer are to be resold or delivered to a third party, Buyer must provide such third party with a copy of this document, all specifications, manuals, catalogs, leaflets and written information provided to Buyer pertaining to the Products/Samples.

KEYENCE CORPORATION

1-3-14, Higashi-Nakajima, Higashi-Yodogawa-ku, Osaka, 533-8555, Japan
PHONE: +81-6-6379-2211

Contact Information for various countries is listed below.

Website: www.keyence.com/glb

Document Number: A4SWW1-MAN-2033-E1101-3

Copyright © 2023 KEYENCE CORPORATION. All rights reserved.

Specifications are subject to change without notice.

Printed in Japan

Models: 1754A, RF41754A, FR-S01, FR Series Radar Type Level Sensor, FR Series, Radar Type Level Sensor, Type Level Sensor, Level Sensor, Sensor

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