Compact Inductive Proximity Sensor GA-311/GH

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Basic Information

High-speed response and excellent workability

UL Approved

UL : Recognition

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Features

Suitable for high-speed applications

It has a high performance of 3.3 kHz response frequency.
These sensors are ideal for sensing objects moving at high speeds.

IP67G sensor head variations

The lineup includes 5 different models, from an ultracompact　2.8 mm 0.110 in diameter type to a spatterresistant type. Furthermore, all except for the GH-2SE are IP67G oil-resistant models so that they can be used with confidence even in adverse environments.

Excellent workability and ease of maintenance

They all have the same form as the FX-300 series of fiber sensors. The quick-connection cables are also of the same shape, so that fiber sensors and laser sensors can all be used together and less power supply wiring is required.

Labor-saving by one-touch connections

The connection between the sensor head and the amplifier is made using a quick-connection connector.
Past troublesome wiring connections using a screwdriver are no longer necessary.

Disconnection alarm indicator and operation indicator have been incorporated

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Order guide

Sensor heads

Type		Appearance (mm in)	Sensing range (Note)		Model No.	Hysteresis
Type		Appearance (mm in)	Maximum operation distance	Stable sensing range	Model No.	Hysteresis
Cylindrical type			1.2mm 0.047 in	0 to 0.6 mm 0 to 0.024 in	GH-2SE	0.07 mm 0.0028 in or less
			1.8mm 0.071 in	0 to 0.8 mm 0 to 0.031 in	GH-3SE	0.05 mm 0.0020 in or less
			2.4mm 0.094 in	0 to 1.0 mm 0 to 0.039 in	GH-5SE	0.05 mm 0.0020 in or less
			4.0mm 0.157 in	0 to 2.0 mm 0 to 0.079 in	GH-8SE	0.04 mm 0.0016 in or less
	Spatter resistant type		4.0mm 0.157 in	0 to 2.0 mm 0 to 0.079 in	GH-F8SE	0.04 mm 0.0016 in or less

Note : The stable sensing range represents the sensing range for which the sensor can satisfy all the given specifications with the standard sensing object.
The maximum operation distance represents the maximum distance for which the sensor can detect the standard sensing object at +20 ℃ +68 ℉ constant ambient temperature.
Usage within the stable sensing range is recommended for accurate sensing applications.

Amplifier

Quick-connection cable is not supplied with the amplifier. Please order it separately.

Type	Appearance	Model No.	Output
Connector type		GA-311	NPN open-collector transistor

Quick-connection cable

Quick-connection cable is not supplied with the amplifier. Please order it separately.

Type	Model No.	Description
Main cable (3-core)	CN-73-C1	Length: 1 m 3.281 ft	0.2 mm² 3-core cabtyre cable, with connector on one end Cable outer diameter: ø3.3 mm ø0.130 in
	CN-73-C2	Length: 2 m 6.562 ft
	CN-73-C5	Length: 5 m 16.404 ft
Sub cable (1-core)	CN-71-C1	Length: 1 m 3.281 ft	0.2 mm² 1-core cabtyre cable, with connector on one end Cable outer diameter: ø3.3 mm ø0.130 in
	CN-71-C2	Length: 2 m 6.562 ft
	CN-71-C5	Length: 5 m 16.404 ft

(Note): The material of Quick-connection cable will be changed from production in March 2013, as soon as the previous ones are shipped out.
・Conductor cross-sectional area has been changed from 0.15mm² to 0.2mm².
・Sheath diameter has been changed from ø3.0mm to ø3.3mm.

End plates

End plates are not supplied with the amplifier. Please order them separately when the amplifiers are mounted in cascade.

Appearance	Model No.	Description
	MS-DIN-E	When cascading multiple amplifiers, or when it moves depending on the way it is installed on a DIN rail, these end plates clamp amplifiers into place on both sides. Make sure to use end plates when cascading multiple amplifiers together. [ 2 pcs. per set ]

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Option

Designation	Model No.	Description
Amplifier mounting bracket	MS-DIN-2	Mounting bracket for amplifier
Sensor head mounting bracket	MS-SS3	Mounting bracket for GH-3SE
	MS-SS5	Mounting bracket for GH-5SE
	MS-SS8	Mounting bracket for GH-8SE

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Specifications

Sensor heads

Type	Cylindrical type
Type					Spatter- resistant type
Model No.	GH-2SE	GH-3SE	GH-5SE	GH-8SE	GH-F8SE
Applicable amplifier	GA-311
Stable sensing range (Note 2)	0 to 0.6 mm 0 to 0.024 in	0 to 0.8 mm 0 to 0.031 in	0 to 1.0 mm 0 to 0.039 in	0 to 2.0 mm 0 to 0.079 in
Max. operation distance (Note 2)	1.2 mm 0.047 in	1.8 mm 0.071 in	2.4 mm 0.094 in	4.0 mm 0.157 in
Standard sensing object	Iron sheet 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in			Iron sheet 10 × 10 × t 1 mm 0.394 × 0.394 × t 0.039 in
Hysteresis (Note 3)	0.07 mm 0.003 in or less	0.05 mm 0.002 in or less		0.04 mm 0.002 in or less
Repeatability (Note 3)	Along sensing axis, perpendicular to sensing axis: 1 μm 0.039 mil or less
Protection	IP50 (IEC)	IP67 (IEC), IP67G (Note 4)
Ambient temperature	-10 to +60 ℃ 14 to +140 ℉, Storage: -20 to +70 ℃ -4 to +158 ℉
Ambient humidity	35 to 85 % RH, Storage: 35 to 85 % RH
Vibration resistance	10 to 55 Hz frequency, 1.5 mm 0.059 in double amplitude in X, Y and Z directions for two hours each
Shock resistance	500 m/s² acceleration (50 G approx.) in X, Y and Z directions five times each
Temperature characteristics (Note 5)	Within ±7 %	Within ±5 %	Within ±4 %
Material	Enclosure: Stainless steel (SUS303) Sensing part: PVC	Enclosure: Stainless steel (SUS303) Sensing part: ABS	Enclosure: Stainless steel (SUS303) Sensing part: PAR	Enclosure: Stainless steel (SUS303) Sensing part: ABS	Enclosure: Stainless steel (SUS303) Sensing part: Fluorine resin
Cable (Note 6)	Oil-resistant [Spatter-resistant type: Spatter-resistant cable (Sheath: Fluorine resin)] high-frequency coaxial cable, 3 m 9.843 ft long, with a connector at the end
Weight	Net weight: 15 g approx. Gross weight: 30 g approx.	Net weight: 35 g approx. Gross weight: 45 g approx.		Net weight: 40 g approx. Gross weight: 55 g approx.	Net weight: 55 g approx. Gross weight: 70 g approx.

Notes:

1) Where measurement conditions have not been specified precisely, the conditions used were an ambient temperature of +23 ℃ +73.4 ℉.

2) The stable sensing range represents the sensing range for which the sensor can satisfy all the given specifications with the standard sensing object.
The maximum operation distance represents the maximum distance for which the sensor can detect the standard sensing object at +20 ℃ +68 ℉ constant ambient temperature.
Usage within the stable sensing range is recommended for accurate sensing applications.

3) The hysteresis and the repeatability are specified for the standard sensing object within the stable sensing range.

4) The length of the sensor head cable cannot be changed.

5) If using the sensor in an environment where cutting oil droplets splatter, the sensor may deteriorate due to added substances in the oil.
Please check the resistivity of the sensor against the cutting oil you are using beforehand.

6) The value represents the variation in the operation distance, that has been set within the stable sensing range at +20 ℃ +68 ℉, for an ambient temperature drift from 0 to +55 ℃ +32 to +131 ℉. (Values are for sensor head only.)

Amplifier

Model No.		GA-311
Applicable sensor head		GH-□SE
Supply voltage		12 to 24 V DC ± 10 % Ripple P-P 10 % or less
Current consumption		25 mA or less
Output		NPN open-collector transistor ・Maximum sink current: 100 mA (50 mA, if five, or more, amplifiers are connected in cascade.) ・Applied voltage: 30 V DC or less (between sensing output and 0 V) ・Residual voltage: 1 V or less [at 100 mA (at 50 mA, if five, or more, amplifiers are connected in cascade) sink current.]
	Output operation	Switchable either Normally open or Normally closed
	Short-circuit protection	Incorporated
Max. response frequency		3.3 kHz
Operation indicator		Orange LED (lights up when the output is ON)
Disconnection alarm indicator		Red LED (lights up when the sensor head cable is disconnected or misconnected)
Sensitivity adjuster		18-turn potentiometer
Ambient temperature		-10 to +60 ℃ +14 to +140 ℉ (If 4 to 7 units are connected in cascade : -10 to +50 ℃ +14 to +122 ℉, if 8 to 16 units are connected in cascade: -10 to +45 ℃ +14 to +113 ℉) (No dew condensation or icing allowed), Storage: -20 to +70 ℃ -4 to +158 ℉
Ambient humidity		35 to 85 % RH, Storage: 35 to 85 % RH
Voltage withstandability		1,000 V AC for one min. between all supply terminals connected together and enclosure
Insulation resistance		20 MΩ, or more, with 250 V DC megger between all supply terminals connected together and enclosure
Vibration resistance		10 to 150 Hz frequency, 0.75 mm double amplitude or maximum acceleration 49 m/s² in X, Y, and Z direction for 2 hours each
Shock resistance		100 m/s² acceleration (10 G approx.) in X, Y and Z directions three times each
Temperature characteristics (Note 2)		Within ±5 %
Material		Enclosure: PBT, Cover: Polycarbonate
Connecting method		Connector (Note 3)
Cable length		Total length up to 100 m 328.084 ft (if 5 to 8 units are connected in cascade: 50 m 164.042 ft, if 9 to 16 units are connected in cascade: 20 m 65.617 ft) is possible with 0.3 mm², or more, cable.
Weight		Net weight: 15 g approx., Gross weight: 40 g approx.

Notes:

1) Where measurement conditions have not been specified precisely, the conditions used were an ambient temperature of +23 ℃ +73.4 ℉.

2) The value of the temperature characteristics gives the variation in the operation distance, that has been set within the stable sensing range at +20 ℃ +68 ℉, for an ambient temperature drift from 0 to +55 ℃ +32 to +131 ℉. (Value is for amplifier only.)

3) The cable for amplifier connection is not supplied as an accessory. Make sure to use the optional quick-connection cable given below.
Main cable (3-core): CN-73-C1 (cable length 1 m 3.281 ft), CN-73-C2 (cable length 2 m 6.562 ft), CN-73-C5 (cable length 5 m 16.404 ft)
Sub cable (1-core): CN-71-C1 (cable length 1 m 3.281 ft), CN-71-C2 (cable length 2 m 6.562 ft), CN-71-C5 (cable length 5 m 16.404 ft)

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Dimensions

Unit: mm in

GA-311

Amplifier

Note:The front view shows the sensor head connector and quick-connection cable connector attached.The top view is without the sensor head connector, quick-connection cable and the cover.

GH-2SE GH-3SE GH-5SE GH-8SE GH-F8SE

Sensor head

Model No.	A	B	C
GH-2SE	ø2.8 ø0.110	12 0.472	ø1.6 ø0.063
GH-3SE	ø3.8 ø0.150	15 0.591	ø2.5 ø0.098
GH-5SE	ø5.4 ø0.213	15 0.591	ø2.5 ø0.098
GH-8SE	ø8.0 ø0.315	15 0.591	ø2.5 ø0.098
GH-F8SE	ø8.0 ø0.315	15 0.591	ø2.65 ø0.104

CN-73-C1 CN-73-C2 CN-73-C5

Main cable (Optional)

• Length L

Model No.	Length L
CN-73-C1	1,000 39.370
CN-73-C2	2,000 78.740
CN-73-C5	5,000 196.850

CN-71-C1 CN-71-C2 CN-71-C5

Sub cable (Optional)

• Length L

Model No.	Length L
CN-71-C1	1,000 39.370
CN-71-C2	2,000 78.740
CN-71-C5	5,000 196.850

MS-DIN-2

Amplifier mounting bracket (Optional)

Material:Cold rolled carbon steel (SPCC) (Uni-chrome plated)

MS-DIN-E

End plate (Optional)

Material:Polycarbonate

MS-SS3 MS-SS5 MS-SS8

Sensor head mounting bracket (Optional)

Material:Nylon 66

Symbol	MS-SS3	MS-SS5	MS-SS8
D	16 0.630	18 0.709	20 0.787
E	9 0.354	10 0.394	11 0.433
F	6.3 0.248	8.3 0.327	10.3 0.406
G	4.9 0.193	6.1 0.240	6.5 0.256
Applicable sensor head model No.	GH-3SE	GH-5SE	GH-8SE

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Sensing field

The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 0.6 mm 0.024 in.

Correlation between sensing object size and sensing range

As the sensing object size becomes smaller than the standard size (iron sheet 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in), the sensing range shortens as shown in the left figure.

(The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 0.6 mm 0.024 in.)

Sensing field

The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 0.8 mm 0.031 in.

Correlation between sensing object size and sensing range

As the sensing object size becomes smaller than the standard size (iron sheet 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in), the sensing range shortens as shown in the left figure.

(The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 0.8 mm 0.031 in.)

Sensing field

The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 1.0 mm 0.039 in.

Correlation between sensing object size and sensing range

As the sensing object size becomes smaller than the standard size (iron sheet 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in), the sensing range shortens as shown in the left figure.

(The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 1.0 mm 0.039 in.)

Sensing field

The graph on the left is plotted with the sensitivity adjusted so as to just detect a 10 × 10 × t 1 mm 0.394 × 0.394 × t 0.039 in iron sheet placed at a distance of 2.0 mm 0.079 in.

Correlation between sensing object size and sensing range

As the sensing object size becomes smaller than the standard size iron sheet 10 × 10 × t 1 mm 0.394 × 0.394 × t 0.039 in), the sensing range shortens as shown in the left figure.

(The graph on the left is plotted with the sensitivity adjusted so as to just detect a 10 × 10 × t 1 mm 0.394 × 0.394 × t 0.039 in iron sheet placed at a distance of 2.0 mm 0.079 in.)

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Model No.	Tightening torque	A (mm in)
GH-2SE	0.17N·m	3 0.118 or more
GH-3SE	0.17N·m	4 0.157 or more
GH-5SE	0.78N·m	5 0.197 or more
GH-8SE GH-F8SE	0.59N·m	5 0.197 or more

Model No.	B (mm in)
GH-2SE	3 0.118
GH-3SE	4 0.157
GH-5SE	5 0.197
GH-8SE GH-F8SE	9 0.354

Model No.	C (mm in)	D (mm in)
GH-2SE	15 0.591	10 0.394
GH-3SE	20 0.787	15 0.591
GH-5SE	25 0.984	20 0.787
GH-8SE GH-F8SE	40 1.575	26 1.024

Sensing range

The sensing range is specified for the standard sensing object. With a non-ferrous metal, the sensing range is obtained by multiplying with the correction coefficient specified below. Further, the sensing range also changes if the sensing object is smaller than the standard sensing object or if the sensing object is plated.

Correction coefficient


	GH-2SE	GH-3SE	GH-5SE	GH-8SE GH-F8SE
Iron	1	1	1	1
Stainless steel (SUS304)	0.68 approx.	0.55 approx.	0.69 approx.	0.64 approx.
Brass	0.53 approx.	0.35 approx.	0.41 approx.	0.37 approx.
Aluminum	0.51 approx.	0.33 approx.	0.39 approx.	0.32 approx.

Others

Do not use during the initial transient time (0.5 sec.) after the power supply is switched on.
Do not use the sensor at places having intense vibrations, as this can cause malfunction.
Make sure that stress by forcible bend or pulling is not applied directly to the cable joint of the sensor head.

Compact Inductive Proximity Sensor GA-311/GH

Basic Information

Features

Suitable for high-speed applications

IP67G sensor head variations

Excellent workability and ease of maintenance

Labor-saving by one-touch connections

Disconnection alarm indicator and operation indicator have been incorporated

Applications

Order guide

Sensor heads

Amplifier

Quick-connection cable

Main cable

Sub cable

End plates

Option

Amplifier mounting bracket

Sensor head mounting bracket

Specifications

Sensor heads

Amplifier

Dimensions

GA-311

GH-2SE GH-3SE GH-5SE GH-8SE GH-F8SE

CN-73-C1 CN-73-C2 CN-73-C5

CN-71-C1 CN-71-C2 CN-71-C5

MS-DIN-2

MS-DIN-E

MS-SS3 MS-SS5 MS-SS8

I/O Circuit and Wiring diagrams

I/O circuit diagram

Wiring diagram

Connector pin position

Sensing characteristics

GH-2SE

GH-3SE

GH-5SE

GH-8SE GH-F8SE

Cautions For Use

Mounting of the sensor head

Others

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