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Compact Inductive Proximity Sensor GA-311/GH

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Specifications

Sensing characteristics

Cautions For Use

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.)

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.

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

Note 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.)

Note 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)

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