Liquid Leakage Sensor Amplifiers K7L-AT50/-AT50D • Ultra-high sensitivity detects impedances of up to 50 M . • Polyethylene makes the Sensing Band more resistant to chemicals. • Series includes models with disconnection detection. *The color of the Sensing Band shown here is a conceptualization and is not necessarily the actual color.
Features Sensing Bands boast high degree of chemical resistance. The K7L can be used in a wide range of applications, from semiconductor production installations to food-processing equipment. Inter-electrode Resistance Detection ■ Application Examples Stable detection of liquids with impedances of up to 50 MΩ and common water. Four sensing ranges are available, ensuring detection suited to the application.
Liquid Leakage Sensor Amplifier K7L-AT50 Ultra-miniature Sensor Amplifier Reliably Detects a Wide Variety of Liquids Ranging from Water to Liquid Chemicals with Low Conductivity. • Detects liquids with impedance as high as 50 MΩ using interelectrode resistance detection. Detection of IPA and pure water is possible. • Four selectable sensing ranges ensure detection suited to the characteristics of the liquid.
Specifications ■ Ratings Rated power supply voltage 12 to 24 VDC (Allowable voltage fluctuation range: 10 to 30 VDC) Operate resistance 0 Ω to 50 MΩ, variable Range 0: 0 to 250 kΩ Range 1: 0 to 600 kΩ Range 2: 0 to 5 MΩ Range 3: 0 to 50 MΩ Note: The range is set using the DIP switch on the side of the Sensor Amplifier. (Refer to DIP Switch Settings.) Set the corresponding pin of the DIP switch in the up position. (For range 0, set all 3 pins in the down position.
Nomenclature Power indicator (green) (Lit when power is supplied. Output indicator (red) (Lit when output is ON.) Resistance value adjuster ■ DIP Switch Settings Setting Sensing Range DIP switch Range number Sensing range DIP switch Output mode Range 0 0 to 250 kΩ Output OFF when liquid leakage detected. Range 1 0 to 600 kΩ Output ON when liquid leakage detected. Range 2 0 to 5 MΩ Range 3 0 to 50 MΩ • Set the sensing range according to the impedance of the liquid to be detected.
■ Connections K7L-AT50 F03-20 Terminal Block OUT+ Open-collector output Signal transmission OUT- 100 mA at 30 VDC max. Level input 1 Level input 2 Connecting cable (0.2 mm2 min.
Liquid Leakage Sensor Amplifier with Disconnection Detection Function K7L-AT50D/-AT50D-S Detect Disconnections between the Sensor Amplifier and a Terminator Connected to the End of the Sensing Band. • Constantly monitors for disconnections between the Sensor Amplifier and the Sensing Band. • Failure to detect liquid leakage due to disconnection in the Sensing Band prevented. • Notification of disconnection detection made using LED indicator and transistor output.
Operation ■ Disconnection Detection Function Operation While Monitoring for Liquid Leakage Operation While Monitoring for Disconnection • Short-wave signals (2.5 VAC, 3.75 Hz) for liquid leakage detection are output from terminal 4 of the K7L. • When there is no liquid leakage, the liquid leakage detection signals that are output are interrupted by the Terminator and the core of the Sensing Band will form an open loop.
Sensing Band F03-16PE • SUS316 used for core and polyethylene used for sheath to ensure high resistance to both acidic and alkaline liquids. • Sensing Band Stickers that use the same material as the Sensing Band’s insulating resin are available in 2 types: adhesivetape type and screw type.
Sensing Band F03-16PT • Compared to the F03-16PE (polyethylene), the F03-16PT has higher resistance to both high temperatures and chemicals. • Small holes enable the detection of leakage even when installed upside down.
Sensing Band F03-15 • Ideal for harsh electrical room environments that are dusty and humid. • For installation in locations requiring insulated materials. Ordering Information Name Model number Remarks Liquid Leakage Sensing Band F03-15 --- Sensing Band Stickers F03-25 30 Stickers per bag Specifications Sheath Flexible, transparent vinyl chloride Core SUS304 stainless steel Ambient operating temperature −15 to 50°C Weight Approx.
Sensing Band F03-16SF • Greater flexibility and superior workability compared with the F03-16PE. • The sheath becomes transparent to reveal the red inner sheath if liquid leakage occurs, thereby enabling visual confirmation. After drying, the Sensing Band color will return to white (F03-16SFC only).
(2) Connection with 61F-GPN-V50 or 61F-WLA (IV Cable + Sensing Band) Sensing Band 0m 10 m 50 m 100 m 150 m 200 m ❍ Wiring Cable Note 0m ❍ ❍ ❍ ❍ ❍ 10 m ❍ ❍ ❍ ❍ ❍ ❍ ❍ 50 m ❍ ❍ ❍ 100 m ❍ ❍ ❍ 150 m ❍ ❍···Can be used. Note: These values are possible provided that a completely insulated 3-conductor VCT cable with a thickness of 0.75mm2 and a dielectric strength of 600 V is used.
Chemical Resistivity for F03-16PE/-16PT Material Sheath Polyethylene Core Fluoroplastic Material SUS316 Sheath Polyethylene Fluoroplastic Core SUS316 Water A A A Toluene C B B Acetone C A A Phenol B B A Ammonia A A A Butanol B A --- Ethanol B A A Fluorine A A C Hydrochloric acid --- A A C Hexane C A Hydrogen peroxide solution A A A Benzene C A A Xylene B A A Methanol B A A Cyclohexane C A --- Sulfuric acid C A B Trichloroethylene C A
Liquid Leakage Sensing Band Precautions Refer to the following installation methods and install the Sensing Band securely using the proper method for the location and environment. 1. Post or Beam Mounting Use fasteners, such as concrete anchors, to secure the Sensing Band every 500 to 1,000 mm to ensure that it does not come loose. If the surface of the post or beam is very uneven, apply two-sided tape to the mounting surface first and then secure the Sensing Band to the tape with the fastener. 2.
FAQs Some questions that are frequently asked about the K7L are given below. Use this information when selecting a model. Can one K7L Amplifier be used for detection in more than one place? Yes. By using Terminal Blocks to connect Sensing Bands in parallel, detection can be performed in more than place with only one K7L Amplifier. Possible wiring distance for wiring cable. Possible wiring distance for Sensing Band. 50 m max. 10 m max. Can a different terminal block (e.g.
Liquid Leakage Point Sensor F03-16PS A New Liquid Leakage Point Sensor Has Been Added to the K7L Series. Fluoroplastic Coating on the Bottom Electrode Ensures Chemical Resistance. • • • • Can be used in conjunction with Sensing Bands. Stud screw mounting requires no tools for installation. No tools means the Sensor can be wiped clean quickly and easily. The optional Mounting Bracket enables faster installation than three-screw mounting.
Dimensions (Unit: mm) Liquid Leakage Sensor Amplifier Terminal Block (See note 1.) K7L-AT50/-AT50D F03-20 29.1 46 3 K7L-AT50D LIQUID LEA50D SENSOR KAGE 2 K7L-AT 3 PW 5.8 3 23.1 5 × 3=15 28.8 2 25 3.2 2 OUT ADJU ST 3 5.8 17.5 4 12.8 2.5 3 4 17 3.2 4 3.5 Terminator (See note 1.) F03-20 24.1 3 28.1 3 Mounting Hole Dimensions 2-4 (4-2) Two, M3 25 3.2 3.2 18±0.2 Track-mounted Sockets (See note 2.) Track-mounted Sockets (See note 2.) P2RF-08 (Round terminals can be used.
Point Sensor Mounting Bracket F03-26PS R5 10 19.2 1 24 1 8.85 3 R3 22.5 12 6 dia. Safety Precautions ■ Precautions for Safe Use ■ Application Precautions Observe the following points to ensure safe operation. You must allow sufficient leeway in ratings and performance, and provide proper fail-safe or other safety measures when using these products in any of the following applications. Be sure also to consult with your OMRON representative before actually attempting any of these applications.
Warranty and Application Considerations Read and Understand this Catalog Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Warranty and Limitations of Liability WARRANTY OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified) from date of sale by OMRON.
