Magnescale GB-ER (SR138R)

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The Magnescale GB-ER (SR138R) is a high-precision linear scale system engineered for demanding industrial environments. Combining Magnescale’s renowned magnetic sensing technology with a compact, rugged design, the GB-ER series delivers exceptional accuracy, reliability, and ease of installation. This system includes the SR138R scale and a pre-adjusted CH04-03C connection cable, ensuring optimal performance right out of the box.

The GB-ER series is built to withstand the harshest workshop conditions. Its magnetic detection system is inherently resistant to oil, dirt, shock, and vibration—making it ideal for CNC machines, lathes, and other precision equipment. With a resolution of 0.5 μm and an accuracy of (5 + 5L/1000) μm, the GB-ER is suitable for high-resolution applications where consistent, repeatable measurements are critical.

Key features

Excellent durability against workshop conditions – resistant to oil, dirt, shock and vibration.
Compact design for a space-saving installation.
Accuracy: Highly accurate (5+5L/1000)μm
Resolution: 0.5μm
Simple structure should be conducive to long life.
Same coefficient of expansion as that of machine tools

Compact Design for Space-Saving Integration

Thanks to its slim profile and integrated reference point, the GB-ER is easy to install in tight spaces without compromising performance. The scale and slider are precisely aligned and secured using a dedicated slider holder, ensuring long-term stability and minimal maintenance. This makes the GB-ER a preferred choice for OEMs and retrofit projects alike

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.

Wide Range of Measurement Lengths

The GB-ER is available in a broad range of lengths, from 50 mm to 2,200 mm, making it suitable for everything from compact benchtop machines to large-scale industrial systems. The SR138R scale is also available separately in various lengths, offering flexibility for custom configurations.

Applications Across Precision Industries

The GB-ER is ideal for:

CNC machining centers
Grinding and milling machines
Precision inspection systems
Coordinate measuring machines (CMMs)
Semiconductor and electronics manufacturing

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

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

Model	GB-ER
Measurement Length (ML) L: mm(inch)	50 (1.9″), 100 (3.9″), 150 (5.9″), 200 (7.8″), 250 (9.8″), 300 (11.8″), 350 (13.7″), 400 (15.7″), 450 (17.7″), 500 (19.6″), 550 (21.6″), 600 (23.6″), 650 (25.5″), 750 (29.5″), 850 (33.4″), 950 (37.4″), 1050 (41.3″), 1250 (49.2″), 1400 (55.1″), 1600 (62.9″), 1850 (72.8″), 2050 (80.7″), 2200 (88.6″)
Overall length	Measuring length + 104 (4.1(50 to 200 mm)”) Measuring length + 120 (4.7(250 to 2200 mm)”)
Max. travel	L + 14 mm (50 to 200 mm) Overall length (250 to 2200 mm) L + 30 mm (250 to 2200 mm) Overall length (50 to 200 mm)
With or without Centerfootplate	Included with ML: 1050 mm to 2200 mm Excluded ML: 50 mm to 950 mm
Accuracy at 20 °C /68 °F	(5 + 5L / 1000) μm
Resolution	0.5 μm
Max. response speed (scale signal, reference signal)	60 m/min
Reference point	Standard:Center of scale, User-defined position also available
Mounting parallelism	± 0.1 mm
Thermal expansion coefficient	(11±1) x 10-6/ °C
Operating temperature	0 °C to 40 °C/ 32 °F to 104 °F
Storage temperature	-20 °C to 50 °C/ 4 °F to 122 °F
Head cable length	0.3 m
Cable length	3 m
Protective design grade	Scale: IP65 (Interpolation Unit: IP30)
Output signal	AB/ quadrature signal, Z signal
Power supply	+5 VDC ±5 %
Connector	D-sub 9 pin
Power consumption	Max. 200 mA