LRNH31S42

Technical information LRN Series Mechanical Minimum operate angle 5 from mounting angle Reed float switch (horizontal models) Maximum release angle 40 from mounting angle (horizontal models) Shock * 50 g for 11 milliseconds duration Vibration * 35 up to 500 Hz Nominal cable length 0.5 m Environmental Nylon 6.6 Diecast metal** Glassfilled**** body polypropylene Operating Temperature Range -30 C to -30 C to -30 C to +130 C +130 C +110 C Minimum SG of liquid 0.85 0.85 0.65 Minimum Viscosity of Liquid 100 100 100 (centipoise) Plastic Housing Water Features absorption of equilibrium at 20 C and 100 % RH 1.3 % 5.6 % 0.03 % High or low level sensing at 100 C and 100 % RH 1.6 % 5.6 % <0.5 % Normally open, normally closed or change over Heat distortion temperature 180 C 245 C 105 C 2 4.5 kg/cm (67.6 psig) contact action Electrical Ratings up to 100 W Switching options 0 1 2 3 4 5 Operates in liquid down to S.G. of 0.65 Switch action SPST SPST SPDT SPST TRIAC TRIAC Internal or external fitting Maximum Switching Voltage Easy to install (Vdc) 100 100 100 100 (VRMS) 120 250 70 120 250 250 Cost effective Maximum Switching Current (A) 1.0 1.0 0.50 3.0 3.0 1.0 dc Contact Rating (W) 15 *** 15 *** 3 *** 100 *** 750 250 Description Minimum Breakdown Voltage (Vdc) 300 800 200 400 - - The Honeywell range of horizontal, vertical and right Initial Contact Resistance () 0.25 0.25 0.25 0.75 - - angled float switches offers the design engineer a * Reed Switch Only combination of versatility and reed switch reliability. A ** Diecast metal model is fitted with Nylon 6.6 float as standard magnet located in the float is used to activate the reed *** The switching performance can be drastically affected if switch ratings switch either on a rising or falling liquid level and the are exceeded. For inductive, capacitive and tungsten filament lamp loads, derate by 50%. All switch ratings are at dc resistive loads. design allows for high or low level sensing simply by **** For boiling water applications the maximum operating temperature limits are:- rotating the switch through 180. A range of internal or Continuous boiling water 80 C external mounting options is available and a universal Non continuous boiling water 100 C mounting kit allows both internal and external mounting. Available in Nylon 6.6 and Glass Filled Polypropylene materials and a range of switching options. LRN float switches are suitable for use in the automotive, chemical, petroleum and food processing industries in signalling and control applications. Typical applications Low coolant level sensing Emergency cut out Fuel or oil level sensing Boiler level warning Solution monitoring High level Flood control Catering and vending machine Domestic appliance Medical equipment Low level 48Ordering information LRN 1 2 3 4 5 6 - 7 8 9 1 Type of orientation H Horizontal V Vertical R Right angled 2 Housing material 3 Nylon 6.6 (-30 to 130 C) 4 Diecast metal body (-30 to 130 C) 5 Glass filled Polypropylene (-30 to 110 C) 3 Switching options 0 S.P.S.T. 120 Vrms/1 A (15 W) 1 S.P.S.T. 250 Vrms/1 A (15 W) 2 S.P.D.T. 70 Vrms/0.5 A (3 W) 3 S.P.S.T. 120 Vrms/3 A (100 W) 4 Triac 250 Vrms/3 A 5 Triac 250 Vrms/1 A 4 Seal washer / Grommet S Silicone N Nitrile 5 Mounting options 0 M16 x 2 internal fit 1 M16 x 2 external fit (compression grommet) 2 1/2 NPT external fit 3 1/4 NPT internal fit 4 Universal kit (internal and external assemblies) 6 Termination 1 0.5 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 Mounting position Stem position must be vertical 15 (vertical & right angle models) Care must be taken to ensure that the product is not Mounting position 30 from horizontal (horizontal models) damaged due to excessive tightening of the fixing nut or threaded bush. Notes: 1. The compression grommet is suitable for a seal pressure of 70 psi. Maximum torque limits are shown below. 2. When using a 1/2 NPT external fit version, the container wall thickness must not exceed the length of male thread section of the switch. Some Model Torque limit Maximum container pipe fittings have a small diameter outside the thread area which will wall thickness restrict entry. This switch is designed to pass through a 1/2 NPT tap drill External fitting 0,718 diameter. Because the mounting bush is usually metal and the (compression grommet) 2.0 lb ft (2.67 Nm) 0.16ins (4 mm) switch is usually moulded plastic, care must be taken when using the 1/2 See Note 1 or 1/4 NPT versions not to over tighten since this will cause damage to External fitting (1/2 NPT) 5.0 lb ft (6.75 Nm) 1.00ins (25 mm) the switch. A sealant such as PTFE tape should always be used on the See Note 2 NPT versions. Ensure that the position orientation arrow on the 1/2 NPT Internal fitting 3.0 lb ft (4.0 Nm) 0.394ins (10 mm) version is vertical. Internal fitting (1/4 NPT) 3. The float assembly on the horizontal models should never be removed into tapered bush 5.0 lb ft (6.75 Nm) 0.50ins (12.7 mm) since this will affect the switching characteristics. through tank wall 4. To reverse the switching action on horizontal models, simply rotate with nut and washer 3.0 lb ft (4.0 Nm) 0.12ins (3 mm)See through 180 observing orientation indicator or arrow. On vertical and See Note 2 right angled models, compress the float stop arms, remove and reverse the float and reassemble. Movement of the float in the direction of the position indication arrow closes the switch contacts at the end of float travel. 49