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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.
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Table of Contents
Related Manuals for Omron K7L-AT50
Summary of Contents for Omron K7L-AT50
- Page 1 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.
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Page 2: Application Examples
Noise Canceller Function (Patent Pending) The K7L incorporates a noise cancel- ler circuit that uses a 3-conductor cable, ensuring a high level of noise K7L-AT50 immunity. Connecting cable Detection of Liquid Leakage at Pipe Joints for Liquid Chemical Tanks Liquid leakage at a pipe joint can be detected by wrapping the Sens- Multiple Installation ing Band around the joint. -
Page 3: Ordering Information
Note: 1. Compared with the standard model, F03-16PE. 2. One F03-20 Terminal Block is included as an accessory with the K7L-AT50. 3. The minimum order for the F03-25, F03-26PES, or F03-26PEN Sensing Band Stickers is one set (contains 30 Stickers). -
Page 4: Specifications
Note: These values are possible on condition that a completely insulated 3-conductor VCT cable with a thickness of 0.75 mm and a dielectric strength of 600 V is used together with a Liquid Sensing Band specified by OMRON. (A 0.2-mm cable can also be used.) Accessories F03-20 Terminal Block (for connecting the connecting cable and Sensing Band) Screwdriver for ADJUST setting. -
Page 5: Operation
K7L signal transmission circuit Signal transmission line Sensing Band Subtraction circuit Line 1 Line 2 Connecting cable Resistance measurement circuit K7L-AT50 Liquid Leakage Sensor Amplifier... -
Page 6: Connection Examples
■ Connections K7L-AT50 F03-20 Terminal Block Signal OUT+ Open-collector output transmission Level input 1 OUT- 100 mA at 30 VDC max. Connecting cable Sensing Band Level input 2 (0.2 mm min.) 12 to 24 VDC ■ Connection Examples NPN Output... - Page 7 The characteristics are the same as for the K7L-AT50. Refer to page 4 for details. Nomenclature The nomenclature and DIP switch settings are the same as for the K7L-AT50. Refer to page 5 for details. K7L-AT50D/-AT50D-S Liquid Leakage Sensor Amplifier with Disconnection Detection Function...
- Page 8 Operation ■ Disconnection Detection Function Operation While Monitoring for Liquid Operation While Monitoring for Leakage Disconnection • Short-wave signals (2.5 VAC, 3.75 Hz) for liquid leakage detection • Output of disconnection detection signals starts within 2 s of power are output from terminal 4 of the K7L. being supplied to the K7L and is repeated at 7-s intervals.
- Page 9 Sensing Band F03-16PE • SUS316 used for core and polyethylene used for sheath to en- sure high resistance to both acidic and alkaline liquids. • Sensing Band Stickers that use the same material as the Sens- ing Band’s insulating resin are available in 2 types: adhesive- tape type and screw type.
- Page 10 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 in- stalled upside down. Ordering Information Name Model number Remarks Fluoroplastic Sensing Band F03-16PT Fluoroplastic Sensing Band Stickers...
- Page 11 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...
- Page 12 Weight Approx. 20 g (1 m) Length of Cable ■ Length of Cable (For reference only. Performance values may differ.) (1) Connection with K7L-AT50 or K7L-AT50D (IV Cable + Sensing Band) Sensing Band 10 m 50 m 100 m 150 m Wiring Cable Note ❍...
- Page 13 (2) Connection with 61F-GPN-V50 or 61F-WLA (IV Cable + Sensing Band) Sensing Band 10 m 50 m 100 m 150 m 200 m Wiring Cable Note ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ 10 m ❍ ❍...
- Page 14 Chemical Resistivity for F03-16PE/-16PT Material Sheath Core Material Sheath Core Polyethylene Fluoroplastic SUS316 Polyethylene Fluoroplastic SUS316 Water Toluene Acetone Phenol Ammonia Butanol Ethanol Fluorine Hydrochloric acid Hexane Hydrogen peroxide solution A Benzene Xylene Methanol Cyclohexane Sulfuric acid Trichloroethylene Phosphoric acid Note: 1.
- Page 15 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 sur- face 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.
- Page 16 Sensing Bands. Sensing Band. 10 m max. 50 m max. K7L-AT50 Can the K7L Amplifier detect pure water? Yes. Even pure water, which has a resistance exceeding 10 M Ω⋅ cm, can Terminal Blocks nearly always be detected if the K7L is used at its maximum sensitiv- ity.
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Page 17: Wiring Diagram
• 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. • Connect multiple Sensors to one K7L-AT50 Amplifier for significant cost savings. Ordering Information Sensors... - Page 18 Note: 1. The Terminal Block is made of nylon 66. Mount the Terminal Block in locations not subject to liquid chemicals using M3 screws. 2. Secure the Sockets with M3 screws at a torque of 0.78 to 1.18 N ⋅ m. K7L-AT50/-AT50D, F03-16PS Liquid Leakage Sensor Amplifier...
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Page 19: Safety Precautions
Be sure also to consult Not doing so may result in burning or malfunction. with your OMRON representative before actually attempting any of • Do not use the product in locations subject to flammable gases or these applications. - Page 20 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. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS.