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LINEAR AND ROTARY POSITION
LFII Series
Longfellow II linear position transducer
The new Longfellow II incorporates design innovations to increase transducer
life and provide greater resistance to vibration, while providing a smooth high-
quality signal for demanding factory control applications. It has a solid
stainless steel shaft, longer front-end bearings, a vibration-free damped
element, a spring-loaded ball joint and a high precision precious metal wiper.
Carrier guides are extruded the full length of the housing to ensure smooth
operation even under severe side load conditions.
The newly designed internal components provide improvements based on
worldwide testing and field experience.
Operating temperature: -65 °C to 105 °C (-85 °F to 221 °F)
Supply voltage (max.): 30 Vdc
Linearity: ± 0.1 %
Starting force (max.):
Standard 0,45 kg (1.0 lb)
Water resistant 2,27 kg (5.0 lb)
Backlash (max.): 0,025 mm (0.001 in)
Total Resistance: 5000 Ohm
Shaft Ø: 1/4 in
Termination: Connector, Binder Series 681
Housing length: = Electrical travel + 3.19 in (81,02 mm)
Mechanical travel: = Electrical travel + 0.09 in (2,29 mm)
0.156 x 0.312 Slot, typ.
(3,962 x 7,925)
3
2
1
Shaft
extended
Mounting feet show above are for
standard LFII models only. Mounting
feet are not included with water
resistant LFII models. Water resistant
LFII models are shipped with brackets.
SCHEMATIC
'X' = Electrical 3.19 in (81,0 mm)
'Y' = Electrical travel - 1.0 in (25,4 mm)
2.00
(50,80)
1.00
(25,40)
0.125
(3,175)
0.62
(15,90)
0.62
(15,90)
1.25
(31,80)
1.25
(31,80)
VIEW A-A
1.68
(42,70)
0.84
(21,30)
0.50
(12,70)
0.25
(6,40)
1.36
(34,5)
0.75 ±0.01
(19,00 ±0,20)
1.88
(47,8)
1/4" - 28 NF-2A Thread
7/16" across flats, typ.
"Y"
"X"
A
A
Mounting Feet (2)
OPTIONS
Standard
Mating connector, 3718401, sold separately
ELECTRICAL TRAVEL (IN (MM)) REFERENCE
6.0 (152,4) LF2S06N5KB6A
9.0 (228,6) LF2S09N5KB6A
12.0 (304,8) LF2S12N5KB6A
14.0 (355,6) LF2S14N5KB6A
18.0 (457,2) LF2S18N5KB6A
24.0 (609,6) LF2S24N5KB6A
30.0 (762,0) LF2S30N5KB6A
36.0 (914,4) LF2S36N5KB6A
48.0 (1219,2) LF2S48N5KB6A
Water resistant
Mating connector, E02903021, sold separately
ELECTRICAL TRAVEL (IN (MM)) REFERENCE
6.0 (152,4) LF2W06N5KB6A
9.0 (228,6) LF2W09N5KB6A
12.0 (304,8) LF2W12N5KB6A
14.0 (355,6) LF2W14N5KB6A
18.0 (457,2) LF2W18N5KB6A
24.0 (609,6) LF2W24N5KB6A
30.0 (762,0) LF2W30N5KB6A
36.0 (914,4) LF2W36N5KB6A
48.0 (1219,2) LF2W48N5KB6A
Linear and
Rotary
Position
Transducers
Honeywell Sensing and Control manufactures a variety of potentiometric position sensors. The sensors use a tried and
true potentiometric technology originally developed for military applications and more recently applied to industrial
markets. MystR
® conductive plastic potentiometric sensors are long-life units designed for rugged industrial
applications. The proprietary MystR
®
conductive plastic has an extensive temperature range, infinite resolution and
provides absolute position measurement on power-up. Intermediate signal conditioning is not required for normal
ratio-metric position sensing. Very small stroke units (5 mm [0.2 in]) and units required to withstand exposure to
harsh chemicals or work immersed in many different oils are available. If there is heavy hose down or spray from oil or
water, a water resistant or waterproof potentiometer such as the AQ series should be used.
Linear products have CE approval, Intrinsically Safe For Class I, II, III, Division 1, Groups A, B, C, D, E, F, G With Entity.
Vmax: 30 Vdc, Imax: 100 mA, Ci: 0.0 micro F, Li: 0.0 mH, T4A @ 105 °C Ambient.
Mechanical life: 1 billion dither operations
Approvals: CE, NEMA 4 - water resistant
Housing: Anodized aluminium
Element: MystR® conductive plastic film
Shaft: Stainless steel
Wiper current: < 1 uA
Resolution: Infinite