LK18B
LK18B - Image 2

Absolute linear encoder

LK18B

Photoelectric absolute linear encoder LK18B has measuring length of up to 3 240 mm depending on customer demand, uses SSI, BiSS or FANUC® α-αi serial interface and produces up to ±5 μm accuracy. The encoder can have an additional 1Vpp (20 μm) incremental output.

Mechanical data

Measuring lengths (ML), mm 70, 120, 170, 220, 270, 320, 370, 420, 470, 520, 570, 620, 720, 770, 820, 920, 1020, 1140, 1240, 1340, 1440, 1540, 1640, 1740, 1840, 2040, 2140, 2240, 2340, 2440, 2540, 2640, 2740, 2840, 2940, 3040, 3140, 3240.
(other intermediate lengths on request)
Accuracy grades to any meter within the ML (at 20°C) ±5 μm
Max. acceleration 30 m/s
Max. traversing speed 2 m/s2
Required moving force < 5 N
Protection (EN 60529) without compressed air: IP54
with compressed air:  IP64
Weight 0.4 kg + 0.8 kg/m
Operating temperature 0…+50°C
Storage temperature -20…+70°C
Permissible humidity (non condensed) 20…80%
Permissible vibration (55 to 2000 Hz) ≤ 100 m/s²
Permissible shock (11 ms) ≤ 150 m/s²

Electrical data

Version SSI BISS-C FANUC® α-αi
Power supply 5V ±5% 5V ±5% 5V ±5%
Current consumption max 250 mA max 250 mA max 250 mA
Measuring step 1) 0.1 / 0.05 μm 0.1 / 0.05 μm 1 / 0.1 μm
Clock frequency 0.1…2 MHz 0.5…10 MHz –
Incremental signals 1) 1 Vpp (20 μm) optional –
Cutoff frequency -3 dB ≤ 150 kHz ≤ 150 kHz –
Maximum cable length 25 m 50 m 25 m

1) select when ordering.

Accessories

Downloads

Product Catalog
Encoder Selection Guide 2025
LK18B Absolute Linear Encoder Datasheet
LK18B 3D Model

Order code

LK18B – X1 -X2 -X3 – X4 -X5/X6
Resolution (X1) Measuring Length (X2) Output Signals (X3) Incremental Signals (X4) Cable Length (X5) Connector Type (X6)
F05 – 0.05 um (only for SSI / BiSS interface)
F01 – 0.1 um
F10 – 1.0 um (only for Fanuc interface)		 0070 – 70 mm
0520 – 520 mm
…
3240 – 3240 mm		 S1 – SSI binary
S2 – SSI binary+error+warning
S3 – SSI Gray
B1 – BiSS binary
F1 – Fanuc binary α
F2 – Fanuc binary αi		 W – without incremental signals
V – 1Vpp		 01 – 1m
02 – 2m
03 – 3m		 W – without connector
B12 – round, 12 pins
C9 – round, 9 pins
C12 – round, 12 pins
D9 – flat, 9 pins
D15 – flat, 15 pins
F20 – half pitch, 20 pins
F20.1 – half pitch, 20 pins, 90 DEG

Order form

    Check the "Order code" tab in the product page to see how to know your order code.