Slimline Short Stroke Linear Position Sensor | LS18

At a Glance

Description

The LS18 Slimline Short Stoke Linear Position Sensor has been specifically designed for industrial and scientific applications that require a narrow bodied and short in length, position sensor. What visually sets it apart from LS01 and LS17 is the sturdy two 3.2mm by 30 degree wide mounting flange, available on the radial configuration of the sensor. Exquisitely engineered, the 19mm diameter body of the sensor is constructed from stainless steel and when combined with the non-wearing inductive technology, will deliver dependable performance for many years.

The non-wearing inductive technology used in the LS18 is a major advance in displacement sensor design. This transducer has the simplicity of a potentiometer with the life of an LVDT. The LS18 sensor outputs a stable DC analogue signal by using simple inductive coils in conjunction with advanced ASIC control technology. As there is no contact between moving electrical components, reliability is high and wear is eliminated for an exceptionally long life. It also overcomes the drawbacks of LVDT technology that typically include; bulky coils, poor length-to-stroke ratios, separate signal conditioning requirements and the need for special magnetic materials.

The LS18 provides a linear output proportional to travel. Each unit is supplied with the output calibrated to the travel required by the customer, any stroke from 0-2mm to 0-50mm can be specified during the order process. The default accuracy of the LS18 is 0.25% FSO, however if you would like a greater accuracy of 0.1% FSO, for stroke ranges above 10mm, then this can be specified during the ordering process too.

The sensor is very robust, the body and push rod being made of stainless steel for long service life and environmental resistance. It is particularly suitable for OEMs seeking good sensor performance for arduous applications such as industrial machinery where cost and reliability is important.

Overall performance, repeatability and stability are outstanding over a wide temperature range. The sensor is easy to install with mounting options including M5 rod eye bearings and body clamps. The push rod by default is supplied, free or captive, with female M4x0.7×7 deep thread. Alternatively, M5 rod eye, dome end and magnetic tip options are available too. The LS18 also offers a wide range of mechanical and electrical options and is IP67 rated. The ability for the LS18 to remain unaffected by external Electrical Magnetic interference is assured by the built in EMC protection that conforms to EN 61000-6-2 and EN 61000-6-3 standards.

Common applications for the Applied Measurements LS18 position sensor include geotechnical testing, R&D, aerospace, civil engineering and automotive.

Applied Measurements can supply a wide variety of instrumentation to complement your LS18 position sensor, such as wireless transmitters and receivers, digital displays and amplifiers.

Technical Specifications

Product Dimensions

Electrical Output Options

Output Option Code	Output Type	Supply Voltages	Load resistance
A	0.5 - 4.5Vdc (ratiometric with supply)	+5Vdc (4.5 - 5.5V)	≥5kΩ
C	0.5-9.5Vdc	+24Vdc nom. (13 - 28V)	≥5kΩ
G	0.5-4.5Vdc	+24Vdc nom. (9 - 28V)	≥5kΩ
H	4-20mA (3-wire source)	+24Vdc nom. (13 - 28V)	≈ 0 - 300Ω max. ~ 1.2 to 6V across 300Ω

Wiring Details

Mechanical Mounting

Depending on options, body can be mounted by flange, rod eye bearing or clamping the sensor body – body clamps are available, if not already ordered. Plunger mounted by M4x0.7 female thread, rod-eye bearing or magnetic tip

Output Characteristic

Plunger extended, at start of normal travel:
– Standard: 23 mm* from Ø19 mm face
– Flange Mount: 16 mm* from flange face *Note: where ball end option is fitted add 5 mm.

The output increases as the plunger extends from the sensor body, the calibrated stroke is between 2mm and 50mm.

WARNINGS
A	Not protected – the sensor is NOT protected against either reverse polarity or over-voltage. The risk of damage should be minimal where the supply current is limited to less than 50mA.
C & G	Supply leads diode protected. Output must not be taken outside 0 to 12V.
H	Supply and output lead diode protected. Do take output negative of 0 volts.

V22.03.2021

Ordering Codes & Options

Example code	LS18	A	-	50	-	L	A	-	0	0	U	N	-		Z	-	000
Product Family
LS18	LS18
Electrical Output
0.5-4.5Vdc (ratiometric with supply)		A
0.5-9.5Vdc		C
0.5-4.5Vdc		G
4-20mA (3-wire source)		H
			-
Displacement
From 2mm to 50mm, in 1mm steps				XXX
					-
Electrical Connection
Radial Cable Gland (IP67)						M
Axial Cable Gland (IP67)						N
Radial Connector, 4-pin M8 (IP67)						K
Axial Connector, 4-pin M8 (IP67)						J
Cable Length
No cable							0
1m							A
2m							B
3m							C
5m							D
10m							E
15m							F
20m							G
								-
Body Fittings
None (standard)									0
Flange Mount									F
M5 Rod-End Bearing (with radial electrical connection only)									N
Push Rod
Not Sprung (standard)										0
Spring Extend										E
Push Rod Fittings
M4 Female Thread (standard)											0
Dome End (available with spring extend option 'E' only)											T
M5 Rod-End Bearing											U
Magnetic Tip											W
Push Rod
Captive/Retained (standard)												N
Non-Captive (can depart body - not available on sprung options)												V
													-
Output Polarity Calibration
Standard														0
Reversed														R
Accuracy @ 20ºC
Standard Non-Linearity															0
Improved Non-Linearity: ≤±0.1%/FSO (0-10mm ranges and higher only)															Z
																-
Special Code
No Special Requirements																	000
Technical Sales will provide specials codes as required																	XXX

accessories

The black polyamide 19mm body clamp fits the LS18 perfectly and is an essential accessory if you need to mechanically grip the body of the displacement sensor and secure both to an external structure e.g. test rig. The BP352 is designed to be secured by 2 x M6 Fixings (not supplied).