LK18
LK18 - Image 2

Absolute linear encoder

LK18

Photoelectric absolute linear encoder LK18 has measuring length of up to 2 040 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; 620; 720; 820; 920; 1020; 1140; 1240; 1340; 1440; 1540; 1640; 1740; 1840; 1940; 2040
(mounting spar optional up to ML 1240, mandatory from ML 1340 to 2040)
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
LK18 Absolute Linear Encoder Datasheet
LK18 3D Model

Order code

LK18 – X1 -X2 -X3 – X4 -X5/X6
Resolution (X1) Measuring Length (X2) Output Signals (X3) Incremental Signals (X4) Cable Length (X5) Connector Type (X6)
F005 – 0.05 um
F01 – 0.1 um
F10 – 1.0 um		 0070 – 70 mm
0520 – 520 mm
…
2040 – 2040 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.