Liquid level sensors. r: Features. Description

Transcription

1 0904 Liquid level sensors r: Features -- Accurate liquid level sensing Solid-state (LL) or Reed-switch (LRN) technology High degree of sealing Compact and reliable Quick response time Suitable for use in a wide range of liquids Various housings and mounting versions Custom packaging available Easy to install Cost effective Description The Honeywell range 01 liquid level sensors offers the design engineer a combination 01 versatility and reliability. They can be used in most chemical and temperature environments. The LL series are TTL compatible, while the LRN series offers higher current switching capability.

2 LRN Series Reed float switch Features High or low level sensing Normally open, normally closed or change over contact action Ratings up to 100W Operates in liquid down to S.G Internal or external litting Easy to install Cost effective Description The Honeywell range 01 horizontal, vertical and right angled Iloat switches offers the design engineer a combination 01 versatility and reed switch reliability. A magnet located in the Iloat is used to activate the reed switch either on a rising or lalling liquid level and the design allows lor high or low level sensing simply by rotating the switch through 180 C. A range 01 internal or external mounting options is available and a universal mounting kit allows both internal and external mounting. Available in Nylon 6.6 and Glass Filled Polypropylene materials and a range 01 switching options. LRN Iloat switch es are suitable lor use in the automotive, chemical, petroleum and lood processing industries in signalling and control applications. Technical Mechanical information Minimum operate angle 5 Irom mounting angle Maximum release angle 40 Irom mounting angle Shock' 50g lor 11 milliseconds duration Vibration' Nominal cable length 0.5 m Environmental 35 up to 500Hz Nylon 6.6 Diecast metal" Glasslilled body polypropylene Operating Temperature Range -30 C to -30 C to -30 C to +130 C +130 C +110 C Minimum SG 01 liquid Minimum Viscosity 01 Liquid (centipoise) Plastic Housing Water absorption 01 equilibrium at 20 C and 100 % RH 1.3% 5.6 % 0.03% at 100 C and 100 % RH 1.6% 5.6% <0.5 % Heat distortion temperature 180 C 245'C 105 C 4.5 kglcm' (67.6 psig) Electrical Switching options O Switch action SPST SPST SPDT SPST TRIAC TRIAC Maximum Switching Voltage (VDC) (VRMS) Maximum Switching Current (A) DC Contact Rating (W) Minimum Breakdown Voltage (VDC) Initial Contact Resistance (O) Reed SWitch Only Diecast metal model is litted with Nylon 6.6 Iloat as standard The switching performance can be drastically affected il switch ratings are exceeded. For inductive, capacitive and tungsten filament lamp loads, derate by 50%. AII switch ratings are at DC resistive loads. Emergency cut out Typical Applications Low coolant level sensing Fuel or oil level sensing Boiler level warning Solution monitoring Flood control Catering and vending machine Domestic appliance Medical equipment High level Low level 8

3 1 1 I Ordering information 1 Type of orientation H Horizontal V Vertical R Right angled - D m m 2 Housing material 3 Nylon 6.6 (-30 to 130 C) 4 Diecast metal body (-30 to 130 C) 5 Glass tilled Polypropylene (-30 to 110 C) rr: 3 Switching options O S.P.S.T. 120 Vrms/1A (15 W) 1 S.P.S.T. 250 Vrms/1A (15 W) 2 S.P.D.T. 70 Vrms/0.5A (3 W) 3 S.P.S.T. 120 Vrms/3A (100 W) 4 Triac 250Vrms/3A 5 Triac 250Vrms/l A 4 Seal / Grommet S Silicone N Nitrile 5 Mounting options O M16 x 2 internal tit 1 M16 x 2 external tit (compression 2 1/2' NPT external tit 3 1/4' NPT internal fit 4 Universal kit (internal and external assemblies) 6 Termination m PVC insulated leadwire 2 2 m PVC insulated leadwire 3 5 m PVC insulated leadwire 4 2 m two core cable 7, 8, 9 Customer specials Mounting information Care must be taken to ensure that the product is not damaged due to excessive tightening of the fixing nut or threaded bush. Maximum torque limits are shown below. Model Torque limit Maximum container wall thickness External fitting (compression 2.0 lb ft (2.67 Nm) 0.16ins (4 mm) See Note 1 External fitting (1,2" NPT) 5.0 lb ft (6.75 Nm) 1.00ins (25 mm) See Note lb ft (4.0 Nm) 0.394ins (10 mm) Internal tittlng (1/4" NPT) into tapered bush 5.0 lb ft (6.75 Nm) 0.50ins (12.7 mm) through tank wall with nut and 3.0 lb ft (4.0 Nm) 0.12ins (3 mm)see See Note 2 Mounting position Stem position must be vertical ± 15' (vertical & right angle models) Mounting position =" 30' from horizontal I Notes 1. The compression grommet is suitable for a seal pressure psi. 2. When using a 1'2" NPT external fit versión. the container wall thickness must not exceed the length 01 male thread section 01 the switch. Some pipe littings have a small diameter outside the thread area which will restrict entry. This switch is designed to pass through a 1/2' NPT tap drill 0.718" diameter. Because the mounting bush is usually metal and the switch is usually moulded plastic, care must be taken when using the 1/2" or 1/4" NPT versions not to over tighten since this will cause damage to the switch. A sealant such as PTFE tape should always be used on the NPT versions. Ensure that the position orientation on the 1/2' NPT version ís vertical. 3. The Iloat assembly on the horizontal models should never be removed since this will aftect the switching characteristics. 4. To reverse the switching action on horizontal models, simply rotate through 180 observing orientation indicator or. On vertical and right angled models, compress the Iloat stop arms, remove and reverse the Iloat and reassemble. Movement 01 the Iloat in the direction 01 the position indication closes the switch contacts at the end 01 Iloat travel. 9

4 Dimensions in inches (mm) LRN - Horizontal models Fixing nut Container wall /~" // ~~ T (13) (20) / / 1.59.". -c /" (40,_3), ' 2. (4~ (51,59) 1.86 Loek /~ //,.} T / / 1.59 r : / (40.3) ( /, l-1.86 (47,34), 2.03 Container wall (51,59) j Friction reliet I (87,89), Container wall I 1=1 I -J=i;=\\lH--I+H ?,~.3f 0(g2r u ==i, onentation eompression lndicator grommet 3.46 " (87,89) Po Sitio n ~~ ~ ';j8 O!87 orientatron (17.3) (22) indicator ==t ' ~ FIXing nut - Container wall ~ Installatien Hole O O 90 The installation hole should (23) be deburred and elean ~HOle 0 O 65 The installation hole should (16,5) be deburred and elean Installatien hele size External fitting 112" NPT (American National Pipe Thread) 1/4" NPT (American National Pipe Thread) (0.4) hlgh (2.0) wrde -1, (9,0) t 1.59 (40,3) orientation (10.0) Container wall l' (lri2~g7) ' (18.24) Tap drill Mounting bush -BD-+ Mounling bush Loek " --' (17,3) -----r l~"" orientation indicator lnstatlation note shouíc be deburred and elean Hole (14) Installatien he le size 10

5 Dimensions in inches (mm) LRN. Vertical models Thread ml6 x 2 prtch FIxing nut Fnction ~ - -~; ;~~~ cornoressron grommet Positron indication Float ----H7 indication Thread m16 x 2 pitch Fixing nut Container 1 Lock ~ wall washer~~~~~~ 050 n-:::l 3.50 max. 1127)'" I (89) --;; al 2.28 trave! (58) max. (22.2).JY Cl@. ~O~, 0.39A1F l~lole o o.ss (16.5) ~) The installation hole should The installation hole should LRN. Right angle models Lock Thread m16 x 2 pitch Fixing nut Friction relief cornpressron grommet Container wau Posuion indlcation i M')l Hole O 0.90 \~ (23) The mstananon hole should 1<~0.39A1F di ii" (10) Cy <:!i ~ Posnion ~! orientation índícator \~i L ~~Hole O (16.5) The 'nstaltatioo bote should be ceourrec and crean Pos.tion orientatron indicator Float stop O 087 max ),~039A,F ~ da) ~cf cy ~ Posiuon ~ ~ orientation ~ W- mdicator End 1i8W 11