Name: Magnescale SR138R (GB-ER) Magnetic Linear Scale System (0.5µm)
Brand: Magnescale
SKU: Magnescale SR138
Price: 499 GBP
Availability: InStock

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Prices starting from: £499.00

Typical pricing varies by model, please contact us for a quote.

Precision Magnetic Linear Scale for High-Accuracy Digital Readout Systems

The Magnescale GB-ER (SR138R) is a premium magnetic linear scale designed for precision machine tool and measurement applications. Renowned for its exceptional accuracy, reliability and resistance to harsh workshop environments, the GB-ER combines Magnescale’s proven magnetic sensing technology with robust construction to deliver dependable position feedback in demanding industrial conditions. The scale is ideal for milling machines, lathes, grinding machines, measuring equipment and precision fixtures where accurate and repeatable positioning is essential.

Unlike conventional optical scales, the GB-ER is highly resistant to oil, coolant, dust, vibration and shock, ensuring consistent performance even in challenging manufacturing environments. With a resolution of 0.5 μm and accuracy of (5 + 5L/1000) μm, the GB-ER is suitable for applications requiring precise measurement and reliable long-term operation.

Key features

0.5 μm Resolution – High-resolution position feedback for precision machining and measurement applications.
Exceptional Accuracy – Accuracy of (5 + 5L/1000) μm across the measuring length.
Magnetic Non-Contact Technology – Resistant to contamination from oil, coolant and dust.
Built-In Reference Point – Enables reliable datum recovery and repeatable positioning.
Shock and Vibration Resistant – Designed specifically for workshop and machine tool environments.
Wide Measuring Range – Available from 50 mm to 2,200 mm measuring lengths.
IP65 Protection Rating – Suitable for use in demanding industrial environments.
Direct Compatibility with Magnescale DRO Counters – Works with LG20, LH70, LH71, LH71A and LH72 digital readout systems.

Designed for Harsh Industrial Environments

The GB-ER uses Magnescale’s proven magnetic scale technology to maintain accuracy in conditions where traditional optical encoders may be affected by contamination. The enclosed scale design provides excellent protection against coolant, cutting fluids and airborne particles, making it particularly well suited to machine shop environments. Its rugged construction ensures reliable operation even when exposed to vibration, shock and frequent machine use.

Specifications

Specification	Value
Resolution	0.5 μm
Accuracy	(5 + 5L/1000) μm
Measuring Lengths	50 mm to 2,200 mm
Maximum Response Speed	60 m/min
Output Signal	A/B Quadrature Signal, Z Signal
Reference Point	Built-In
Protection Rating	IP65 (Scale)
Operating Temperature	0°C to 40°C
Thermal Expansion Coefficient	(11 ±1) × 10⁻⁶ / °C

Pre-Calibrated Cable for Plug-and-Play Setup

Each GB-ER unit includes a CH04-03C cable that has been electronically adjusted to match the scale, eliminating the need for manual calibration. This simplifies installation and ensures optimal signal integrity, even in electrically noisy environments.

High Accuracy for Precision Applications

With a resolution of 0.5 μm and an accuracy specification of (5 + 5L/1000) μm, the GB-ER is one of the highest-performance scales available within the Magnescale DRO range. The integrated reference mark allows users to quickly establish a repeatable datum position, improving setup efficiency and maintaining measurement consistency.

Available measuring lengths range from 50 mm to 2,200 mm, allowing the scale to be configured for compact measuring fixtures through to large machine tool installations.

Compatible Digital Readout Systems

The GB-ER can be connected directly to Magnescale digital readout counters, including:

LG20
LH70
LH71
LH71A
LH72

These combinations provide reliable position measurement for manual and semi-automatic machine tools across a wide range of manufacturing applications.

Applications Across Precision Industries

The GB-ER is ideal for:

Milling machines
Precision lathes
Surface grinders
Toolroom equipment
Measuring machines
Inspection fixtures
Special-purpose machinery
Machine tool retrofits

Its high resolution and rugged construction make it a trusted solution in industries where accuracy and reliability are non-negotiable.

What is the Magnescale GB-ER (SR138R)?

The Magnescale GB-ER (SR138R) is a high-accuracy magnetic linear scale system designed for digital readout (DRO) applications on machine tools and precision measuring equipment. With a resolution of 0.5 μm and excellent environmental resistance, it delivers reliable position feedback in demanding industrial environments.

What is included with the GB-ER (SR138R) system?

The complete GB-ER system includes the SR138R magnetic linear scale and a factory pre-adjusted CH04-03C connection cable. This matched assembly ensures optimal performance, reliable signal transmission and straightforward installation straight out of the box.

Which digital readout displays are compatible with the GB-ER?

The GB-ER is compatible with Magnescale LG20, LH70, LH71, LH71A and LH72 digital readout counters, making it suitable for a wide range of machine tool and measurement applications.

What accuracy does the GB-ER provide?

The GB-ER offers an accuracy of (5 + 5L/1000) μm and a resolution of 0.5 μm, making it ideal for precision machining, inspection and measurement tasks.

What measuring lengths are available?

The GB-ER is available in measuring lengths from 50 mm to 2,200 mm, allowing it to be installed on everything from compact measuring fixtures to large machine tools.

Is the GB-ER suitable for harsh workshop environments?

Yes. The GB-ER uses Magnescale’s proven magnetic sensing technology, which is highly resistant to oil, coolant, dust, vibration and shock. Its IP65-rated construction makes it particularly well suited to workshop and production environments.

Can the GB-ER replace older Sony Magnescale systems?

In many applications, the GB-ER is used as a replacement for older Sony Magnescale linear scales. Our team can help identify the most suitable replacement based on your existing scale model and machine requirements.

What machines is the GB-ER commonly used on?

The GB-ER is commonly installed on:

Milling machines
Centre lathes
Surface grinders
Measuring machines
Inspection fixtures
Special-purpose machinery

These applications benefit from the scale’s high accuracy and exceptional environmental resistance.

Does the GB-ER include a reference point?

Yes. The GB-ER includes an integrated reference point, enabling reliable datum setting and repeatable machine positioning when used with compatible Magnescale DRO counters.

Why choose a magnetic linear scale instead of an optical scale?

Magnetic linear scales offer excellent resistance to contamination from oil, coolant, dust and swarf. This makes them particularly suitable for machine tool environments where long-term reliability and consistent performance are essential.

What is the difference between the GB-ER and SJ700A?

The GB-ER is the higher-accuracy scale within the Magnescale DRO range, offering 0.5 μm resolution and built-in reference point functionality. The SJ700A is a more economical solution designed for general-purpose DRO applications with a resolution of 5 μm.

GB-ER scale + cable units

Part number	Model	Description
97928518	GB-5ER	with 3 m cable; ML*: 50 mm
97928519	GB-10ER	with 3 m cable; ML*: 100 mm
97928520	GB-15ER	with 3 m cable; ML*: 150 mm
97928521	GB-20ER	with 3 m cable; ML*: 200 mm
97928522	GB-25ER	with 3 m cable; ML*: 250 mm
97928523	GB-30ER	with 3 m cable; ML*:300 mm
97928524	GB-35ER	with 3 m cable; ML*: 350 mm
97928525	GB-40ER	with 3 m cable; ML*: 400 mm
97928526	GB-45ER	with 3 m cable; ML*: 450 mm
97928527	GB-50ER	with 3 m cable; ML*: 500 mm
97928528	GB-55ER	with 3 m cable; ML*: 550 mm
97928529	GB-60ER	with 3 m cable; ML*: 600 mm
97928530	GB-65ER	with 3 m cable; ML*: 650 mm
97928531	GB-75ER	with 3 m cable; ML*: 750 mm
97928532	GB-85ER	with 3 m cable; ML*: 850 mm
97928533	GB-95ER	with 3 m cable; ML*: 950 mm
97928534	GB-105ER	with 3 m cable; ML*: 1.050 mm
97928535	GB-125ER	with 3 m cable; ML*: 1.250 mm
97928536	GB-140ER	with 3 m cable; ML*: 1.400 mm
97928537	GB-160ER	with 3 m cable; ML*: 1.600 mm
97928538	GB-185ER	with 3 m cable; ML*: 1.850 mm
97928539	GB-205ER	with 3 m cable; ML*: 2.050 mm
97928540	GB-220ER	with 3 m cable; ML*: 2.200 mm

SR138 scales

Part number	Model	Description
97928541	SR138-005R	SR138-005R Scale (ML 5cm)
97928542	SR138-010R	SR138-010R Scale (ML 10cm)
97928543	SR138-015R	SR138-015R Scale (ML 15cm)
97938760	SR138-015RT01	SR138-015RT01 Scale (ML 15cm), head cable length 2m
97928544	SR138-020R	SR138-020R Scale (ML 20cm)
97928545	SR138-025R	SR138-025R Scale (ML 25cm)
97928546	SR138-030R	SR138-030R Scale (ML 30cm)
97928547	SR138-035R	SR138-035R Scale (ML 35cm)
97928548	SR138-040R	SR138-040R Scale (ML 40cm)
97928549	SR138-045R	SR138-045R Scale (ML 45cm)
97928550	SR138-050R	SR138-050R Scale (ML 50cm)
97928551	SR138-055R	SR138-055R Scale (ML 55cm)
97928552	SR138-060R	SR138-060R Scale (ML 60cm)
97928553	SR138-065R	SR138-065R Scale (ML 65cm)
97928554	SR138-075R	SR138-075R Scale (ML 75cm)
97501476	SR138-075RSS600	SR138-075RSS600 Scale (ML 75cm), Ref 600mm
97928555	SR138-085R	SR138-085R Scale (ML 85cm)
97928556	SR138-095R	SR138-095R Scale (ML 95cm)
97928557	SR138-105R	SR138-105R Scale (ML 105cm)
97501470	SR138-105RSS900	SR138-105RSS900 Scale (ML 105cm), Ref 900mm
97928558	SR138-125R	SR138-125R Scale (ML 125cm)
97928559	SR138-140R	SR138-140R Scale (ML 140cm)
97928560	SR138-160R	SR138-160R Scale (ML 160cm)
97928561	SR138-185R	SR138-185R Scale (ML 185cm)
97928562	SR138-205R	SR138-205R Scale (ML 205cm)
97928563	SR138-220R	SR138-220R Scale (ML 220cm)

Cable for SR138R

Part number	Model	Description
97958564	CH04-03C	Cable for SR138R (3 m; armored)
97938706	CH04-05CT01	Cable for SR138R (5 m; armored)
97966101	CE10-01C	Extension cable (1 m; armored)
97966102	CE10-03C	Extension cable (3 m; armored)
97966103	CE10-05C	Extension cable (5 m; armored)
97966104	CE10-10C	Extension cable (10 m; armored)
97930125	SZ51-AB01	(AB/UD; RS422/TLL; configurable)
97928895	CE30	Adaptor cable