LLN Series Honeywell D 903 Industrial liquid level sensors Features TTL-compatible - 200 mA sinking output High degree of sealing - IP67 @ Stainless steel housings for long life and ease of cleaning Quick-connect, industry-standard cable assembly for easy installation Wide operating temperature range (-40 to +125C) Compact optoelectronic design gives accurate, reliable results Polysulphone sensor dome suitable for hygiene applications (FDA, UL, CSA and Sanitary Spec 3-A) @ Integrated power regulation Description LLN Series industrial liquid level sensors are designed for industrial environments exposed to extremes of temperature, pressure, vibration and shock. Standard devices feature rugged, stainless steel housings and polysulphone domes. Nickel-plated brass housings and polyamide domes are available to special order. The mode of operation is derived from the principle of total internal reflection (see figure 1). An LED and optoschmitt are housed within a plastic dome at the head of the device. When no liquid is present, all light from the LED is totally internally reflected from the boundary to the optoschmitt. When liquid covers the dome, the effective refractive index at the dome liquid boundary changes, allowing some light from the LED to escape. Thus, the amount of light received by the optoschmitt is reduced and the output switches, denoting the presence of liquid. This method of liquid level sensing is very fast. Typical applications Industrial compressors Machine tools Material handling Processing and packaging equipment Heavy-duty automotive Technical information Specifications Operation mode User defined single on/off switch Repeatability (mm) #1 Hysteresis (mm) 1 (Dependent on liquid) Response time Rising liquid level - instantaneous Falling liquid level - 1s max. (in ethanol). Response in other liquids dependent on viscosity Mechanical Mounting Exterior mounting by 3/8 B.S.P. thread Installation Wall or base mounting Connector 3-pin integral Lumberg/Brad Harrison type connector Pin 1 supply (V,,,.) Pin3 OV Pin4 output A range of cable/connector assemblies is available Material Polysulphone or polyamide dome, stainless steel housing (other materials available on request) Dimensions Dome 3,5 mm radius Thread 3/8" B.S.P. Hex 24 mm Environmental Operating temperature (C) -40 to +125 (Sensing end only) Storage temperature (C) -50 to +90 Humidity No effect on operation, dependent upon catalogue listing Vibration/shock Qualification tested 100 to 5000 Hz at 30g to B.S.2011 part 2.1 Pressure range (bar) 0-25 Ambient light limit (Lux) 20000 at 0,6 m Electrical Supply voltage (V_.) 10 to 40 Vde Reverse voltage protection to 40 Vdc Short circuit protection to 40 Vdc Supply current Optoschmitt (I,) : 8 mA typical LED (lep) : 15 to 50 mA, dependent upon catalogue listing Output sink current (I) 200 mA max Ordering information Electrical connections Catalogue listing LLN865172-1 Description Stainless steel housed Polysulphone dome 35 mA LED drive current NPN output, high in air Stainless steel housed Polysulphone dome 35 mA LED drive current NPN output, low in air Stainless steel housed Polysulphone dome 15 mA LED drive current NPN output, high in air Stainless steel housed Polysulphone dome 15 mA LED drive current NPN output, low in air Stainless steel housed Polysulphone dome 50 mA LED drive current NPN output, high in air Stainless steel housed Polysulphone dome 50 mA LED drive current NPN output, low in air 2m of cable 3-pin female connector assembly Straight head LLN865172-2 LLN865172-4 LLN865172-5 LLN865172-6 LLN865172-7 HLC131-020 HLC231-020 2m of cable 3-pin female connector assembly Angled head Note: In normal operating conditions a sensor with LED drive current of 35 mA should be selected. In situations where extreme bubbling may occur, then the sensors with drive current 15 mA should be selected (i.e. LLN865172-4 and LLN865172-5). Where extreme condensation may be present, then the sensors with drive current 50 mA should be selected. (For assistance on these points see Application Note LL3 or contact local sales office). Principle - LLN in air Figure 1 & Veo 10-40 V pe er i 71 I! | Output \ Internal circuitry 7 I Voltage regulator] pull-up \ \ | \ Vi ; Schmitt I Amplifier | tigger t / Photo ae diode \ 1 i Figure 2 Mounting dimensions (for reference only) Threaded re 8 Thread 3/8" i M12x1x8G == / / BSP f > Pin numbers 90,0 max, Notes A Polysulphone sensor, stainless steel housing. B Recommended tightening torque 30 Nm. C 3-pin connector for mating with female connectors Lumberg RAKT4/3 or, RAWT4 or Brad Harrison M.C. DC4 wire. D Ambient light has no effect on the high output state. E Self-adhesive label with Honeywell logo, part number and date code. Figure 3 Austria Honeywell Austria GmbH, Edelsinnstrasse 7-11, 1121 Wien. Tel : (0222) 811 0710 Telex : 133302 or 132984 Fax : (0222) 811 014 Belgium Honeywell S.A./N.V., Av, de Schiphol/Laan 3, 1140 Bruxelles/Brussel. Tel: (02) 728 2711 Telex : 22788 Fax : (0) 728 2468 Denmark Honeywell A/S, Lyngby Hovedgade 98 2800 Lyngby. Tel : (45) 93.56.56 Fax : (45) 93.57.80 Finland Honeywell OY, Ruukintie 8, 02320 Espoo 32. Tel : (0) 80 101 Telex : 121229 Fax : (0) 801 1297 France Honeywell, 4 Avenue Ampre-Montigny, 78886 St. Quentin-en-velines Cedex. Tel : (01) 30588000 Telex : 695513 Fax : (01) 30443064 Germany Honeywell GmbH, Kaiserleistrasse 39. 6050 Offenbach/Main. Tal: (069) 80 640 Telex : 4152758 Fax : (069) 818 620 Italy Honeywell S.p.A., Via Vittor Pisani 13, 20124 Milano. Tal: (02) 67 731 Telex : 311092 Fax : (02) 677 3208 The Netherlands Honeywell B.V., Laarderhoogtweg 18, _ 1101 EA Amsterdam 2.0. Tel: (020) 565 69 11 Telex : 14257 Fax : (020) 565 66 00 Norway Honeywell A/S, Askerveien 61, 1371 Asker, Tal ; (066) 90 20 30 Telex ; 19345 Fax : (066) 78 03 04 Portugal Honeywell Automacao E Controle LDA, Edificio Suecia 11, Av. do Forte nr. 3 - Piso 3, Carnaxide, 2795 Linda a Velha. Tel : (01) 417 2602 Fax : (01) 417 2600 Spain Honeywell S.A., Apartado de Correos 29106 28080 Madrid. Tel: (91) 320 2112 Telex ; 22470 Fax : (91) 320 9389 Sweden Honeywell A.B., Storsatragrand 5, 12786 Skarholmen. Tel : (08) 775 5500 Telex : 10673 Fax : (08) 775 5600 Switzerland Honeywell A.G., Hertistrasse 2. 8304 Wallisellen. Tel : (1) 939 25 26 Fax : (1) 83103 14 United Kingdom Honeywell Control Systems Ltd., Honeywell House, Charles Square, Bracknell, Berkshire, RG12 1EB. Tel : (0344) 424 555 Telex : 847064 Fax : (0344) 416015 Note: this publication constitutes no contract between us and our customers and may be changed without notice. Safe installation and operation of our products remain customer's liability. Detailed mounting drawings of all our products illustrated available on request. Honeywell 1993 Eastern Europe Please contact Honeywell Austria Mediterranean Basin, Middle East & Africa Honeywell International, Management S.p.A., Via Volta 16, 20093 Cologno Monzese, Milano, Italy. Tel : (02) 273 211 Telex : 324044 Fax : (02) 273 21 240 or 250 (including Yugoslavia) Asia Pacific Region Honeywell Asia Pacific Inc., 30F Suite 3001 Office Tower, Convention Plaza, 1 Harbour Road, Wanchai, Hong Kong. Tel: 629 8298 Fax : 824 1226 Canada Honeywell Components Division, 740 Ellesmere Road, Scarborough, Ontario, MIP 29. Tel: (416) 293 8111 Telex: 065 25170 Fax: (416) 297 4217 Honeywell ENOM-0353 5/92 Issue 2. Helping You Control Your World