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Pipe-Mounted Liquid Level Fiber Units HPF-T032/T032E HPF-T034/T034E Fail-safe detection is available by using two different sensing methods for the upper and lower limits on the level of liquid in a tank. An array of 16 optical axes eliminates the effects of air bubbles and water droplets PFA-jacketed fiber Fits a wide range of pipe diameters. Location of the optical axes is clearly marked. FEATURES Array of 16 optical axes eliminates the effects of air bubbles and water droplets PFA-jacketed optical fiber Adverse effects from air bubbles and water droplets are reduced, resulting in reliable detection. Fiber-optic cables protected by chemical-resistant resin can be run through machines and equipment safely (HPF-T032 and HPF-T034 only). Fail-safe concept Lower limit detection Upper limit detection Required optical system Abnormality or Liquid is present, so no light is received. Broken fiber, no light received Required optical system Abnormality Models that receive light when there is no liquid or Liquid is absent, so no light is received. HPF-T034 HPF-T034E Broken fiber, no light received Models that receive light when liquid is present HPF-T032 HPF-T032E PRINCIPLE OF DETECTION Operating principle of HPF-T032 and T032E Operating principle of HPF-T034 and T034E Liquid absent Liquid present (Colorless liquid) Liquid present Liquid absent Light received Light emitted Light received Light received (Whitish liquid) Light received Light emitted Light received Light emitted (When pipe contains air bubbles or is clouded.) Light received Light emitted Light reception is blocked when liquid is present, which prevents false detection due to a change in the liquid’s color. 1 Light emitted Light emitted Clouding and bubbles reduce the level of received light, but thanks to the operating principle (light = liquid present) they do not increase the risk of false delection. RECOMMENDED COMPATIBLE AMPLIFIER UNIT HPX-AG02 (alarm output) model Alarm output model (HPX-AG02) <Exterior view> This switch warns if the scanning conditions are unsuitable by means of a second output (light-level drop alarm output). Sample use: surface detection of liquids such as slurry An alarm signal indicating a drop in the light level is output if the inside wall of the pipe becomes dirty, averting potential problems. <Operation panel> After time passes <Typical models> Model No. Output HPX-AG02-1S HPX-EG02-2S NPN PNP Thru scan (Attached to pipe) Type Compatible pipe dia. Liquid-absent received light 8~19 mm (3/4B) Cable Shape Bend radius Free cut HPF-T034E-L02 Free cut Free cut HPF-T032E Polyethylene 2m −30 to +70ºC HPF-T032 PFA 5m R4 3~13 mm HPF-T034E Polyethylene 2m Model No. HPF-T034 PFA 5m R4 −30 to +70ºC Liquid-present received light Length Coating material HPF-T032E-L02 Free cut Use with PFA transparent pipe with wall thickness of 1 mm. Depending on the pipe actually used, as well as the liquid thru scan and refractive ratios, fiber unit detection may not be reliable, so be sure to test the operation before use. If the fiber unit is used with other than the recommended pipe, material, or wall thickness, please test before use or consult our sales staff. OUTER DIMENSIONS HPF-T034 HPF-T034E HPF-T034E-L02 (unit: mm) 12 36 *2 HPF-T032 HPF-T032E HPF-T032E-L02 Model No. HPF-T034 HPF-T034E HPF-T034E-L02 28 5000 mm min. Cable dia.*2 2×2.3 5000 mm min. 2×2.2 2000 mm min. 2×2.2 Cable length*1 23.4 *1 *2 13.1 32 20 21 12 Model No. HPF-T032 HPF-T032E HPF-T032E-L02 28 5000 mm min. Cable dia.*2 2×2.3 5000 mm min. 2×2.2 2000 mm min. 2×2.2 Cable length*1 USAGE NOTES (TYPE-SPECIFIC) Pipe-mounted liquid level detection Attach the unit using the supplied cable ties and non-slip tubes as shown here. Securely fasten both the upper and lower cable ties and cut off any excess. Where additional cable ties are required, use ones which are no more than 2.5 mm wide (dimension A in the figure). A * The supplied cable ties (with non-slip tubing) can also be purchased separately. Model: SZ-A01 (5 sets) Before use, thoroughly read the “Precautions for use” and “Precautions for handling” in the Technical Guide on pages A-141 to A-156 as well as the instruction manual and product specification for this switch. 2 *1