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GT2 Series
High-precision Contact Digital Sensor |

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Specifications 1
Best in Class Performance with the Specifications to Prove it
| Sensor heads for the GT2 Air Push Type |
| Model |
GT2-A12K |
GT2-A12KL |
GT2-A12 |
GT2-A12L |
GT2-A32 |
GT2-A50 |
| Type |
Standard / Low stress (L) type (Sensor head for 12 mm 0.47") |
Standard type (Sensor head for 32 mm 1.26"/50 mm 1.97" range) |
| Appearance |
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| Detection system |
Quartz glass scale, CMOS image sensor projection system,
Absolute type (without tracking error) |
| Measuring range |
12 mm 0.47" |
32 mm 1.26" |
50 mm 1.97" |
| Resolution |
0.1 μm 0.004 Mil |
0.5 μm 0.02 Mil |
| Accuracy (1) |
1 μm 0.04 Mil (p-p) |
2 μm 0.08 Mil
(p-p) |
3 μm 0.12 Mil
(p-p) |
3.5 μm 0.14 Mil
(p-p) |
| Measuring force (2) |
Downward mounting |
1.2 N |
0.4 N |
1.2 N |
0.4 N |
2.1 N |
3.2 N |
| Side mounting |
1.1 N |
0.3 N |
1.1 N |
0.3 N |
1.8 N |
2.8 N |
| Upward mounting |
1.0 N |
0.2 N |
1.0 N |
0.2 N |
1.5 N |
2.4 N |
| Operation indicator |
2-color LED (red, green) |
| Applied pressure range |
0.25 to 0.5 MPa |
| Pressure resistance |
1.0 MPa |
| Environmental resistance |
Enclosure rating |
IP67 (3) |
– |
IP67 (3) |
– |
IP67 (3) |
IP67 (3) |
| Ambient temperature |
0 to 55ºC (32 to 131ºF) |
| Relative humidity |
35 to 85% RH (No condensation) |
| Vibration (4) |
10 to 55 Hz, 1.5 mm 0.06" double amplitude,
2 hours in each of X, Y, and Z directions |
| Sensor head cable |
Optional (M8 connector) |
| Materials |
Main body |
Main body case: Zinc die-casting; Cylinder part: Aluminium alloy; Air joint resin part: Polyacetal;
Air joint metal part: Brass nickel plating; Indicator: Polyarylate |
| Dust boot |
NBR |
– |
NBR |
– |
NBR |
NBR |
| Contact (5) |
TYPE304 Stainless steel, super-tough tungsten alloy |
TYPE304, 440C Stainless steel |
| Weight (excluding cable) |
Approx. 145 g |
Approx. 340 g |
Approx. 405 g |
| Accessories |
Refer to the instruction manual. |
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*1 Value when ambient temperature is 20ºC (68ºF)
*2 Value at center of measuring range.
Please note that the measurement force changes depending on the installation state of the dust boots.
*3 Make sure the air tube is connected to the air exhaust joint and that no foreign materials enter inside from the joint.
*4 In the case where a mounting bracket D is used with GT2-A32 and GT2-A50, the double amplitude becomes 0.75 mm 0.03".
*5 The contact is included with the sensor. |
| Sensor head for 12 mm 0.47" (Standard/Low stress (L) type) |
| Model |
GT2-H12K |
GT2-H12KL |
GT2-H12 |
GT2-H12L |
| Appearance |
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| Detection system |
Quarts glass scale, CMOS image sensor projection system, Absolute type (without tracking error) |
| Measuring range |
12 mm 0.47" |
| Resolution |
0.1 μm 0.004 Mil |
0.5 μm 0.02 Mil |
| Accuracy (20ºC (68ºF)) |
1 μm 0.04 Mil (p-p) |
2 μm 0.08 Mil (p-p) |
| Measuring force (1) |
Downward mounting |
1.0 N |
0.4 N |
1.0 N |
0.4 N |
| Side mounting |
0.9 N |
0.3 N |
0.9 N |
0.3 N |
| Upward mounting |
0.8 N |
0.2 N |
0.8 N |
0.2 N |
| Mechanical response |
10 Hz |
4 Hz |
10 Hz |
4 Hz |
| Probe |
Carbide ball ø3 |
Steel ball ø3 |
| Operation indicator |
2-color LED (red, green) |
Environmental resistance |
Enclosure rating |
IP67 |
– |
IP67 |
– |
| Ambient temperature |
-10 to +55ºC (14 to 131ºF) |
| Relative humidity |
35 to 85% RH (No condensation) |
| Vibration |
10 to 55 Hz, 1.5 mm 0.06" double amplitude, 2 hours in each of X, Y, and Z directions |
| Sensor head cable |
Optional (M8 connector) |
| Materials |
Main body |
Main body cast: Zinc die-casting, Indicator: Polyarylate, Dust boot: NBR (2) |
| Contact |
TYPE304 Stainless steel, super-tough tungsten alloy |
TYPE304, 440C Stainless steel |
| Weight (excluding cable) |
Approx. 95 g |
| Accessories |
Refer to the instruction manual. |
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*1 Value at center of measuring range.
*2 A dust boot is not provided with the GT2-H12KL or the GT2-H12L. |
| Sensor head for 32 mm 1.26"/50 mm 1.97" range (Standard/Low stress (L) type) |
| Model |
GT2-H32 |
GT2-H32L |
GT2-H50 |
| Appearance |
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| Detection system |
Quarts glass scale, CMOS image sensor projection system, Absolute type (without tracking error) |
| Measuring range |
32 mm 1.26" |
50 mm 1.97" |
| Resolution |
0.5 μm 0.02 Mil |
| Accuracy (20ºC (68ºF)) |
3 μm 0.12 Mil (p-p) |
3.5 μm 0.14 Mil (p-p) |
| Measuring force (1) |
Downward mounting |
2.1 N |
1.2 N |
3.2 N |
| Side mounting |
1.8 N |
0.9 N |
2.8 N |
| Upward mounting |
1.5 N |
0.6 N |
2.4 N |
| Mechanical response |
6 Hz |
5 Hz |
7 Hz |
| Probe |
Steel ball ø3 |
| Operation indicator |
2-color LED (red, green) |
Environmental
resistance |
Enclosure rating |
IP67 |
– |
IP67 |
| Ambient temperature |
-10 to +55ºC (14 to 131ºF) |
| Relative humidity |
35 to 85% RH (No condensation) |
| Vibration |
10 to 55 Hz, 1.5 mm 0.06" double amplitude, 2 hours in each of X, Y, and Z directions |
| Sensor head cable |
Optional (M8 connector) |
| Materials |
Main body |
Main body cast: Zinc die-casting, Indicator: Polyarylate, Dust boot: NBR (2) |
| Contact |
TYPE304, 440C Stainless steel |
| Weight (excluding cable) |
Approx. 270 g |
Approx. 320 g |
| Accessories |
Refer to the instruction manual. |
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*1 Value at center of measuring range. *2 A dust boot is not provided with the GT2-H32L. |
| DIN-rail mount type amplifier unit |
| Model |
NPN output |
GT2-71N |
GT2-72N |
GT2-71CN |
GT2-72CN |
GT2-71MCN |
| PNP output |
GT2-71P |
GT2-72P |
GT2-71CP |
GT2-72CP |
GT2-71MCP |
| Mounting method |
DIN-rail mount |
| Type |
Standard loose wire type |
Standard connector type |
Analog output, connector type |
| Main unit / Expansion unit (1) |
Main unit |
Expansion unit |
Main unit |
Expansion unit |
Main unit |
| Appearance |
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| Power supply voltage (1) |
10 to 30 VDC, including 10% ripple (P-P) |
20 to 30 VDC, including 10% ripple (P-P) |
Power
consumption (2) |
Normal |
2200 mW max. (30 V, 73.3 mA max.) |
2700 mW max. (30 V, 90 mA max.) |
| Power saving (Eco) |
1700 mW max. (30 V, 56.7 mA max.) |
2200 mW max. (30 V, 73.3 mA max.) |
| Display power |
Measured value display |
6 + 1/2-digit 7-segment LED (red) |
| Other displays |
2-color, 13-level bar LED display (red, green), indicators (red, green) |
| Display range |
-199.999.9 to 199.999.9 |
| Display resolution |
0.1 μm 0.004 Mil |
| Sampling rate |
1000 times/sec. |
| Control input |
Timing input |
Non-voltage input (Contact, non-contact), Input time: 2 ms min. |
| Preset input |
Non-voltage input (Contact, non-contact), Input time: 20 ms min. |
| Reset input |
| Bank input |
Control
output |
HH / High / Go /
low / LL |
NPN/PNP open collector, non-voltage output, Applicable current: 50 mA,
Maximum applicable voltage (NPN: 40 V, PNP: 30 V)
Residual voltage at ON: 1 V max. * N.O./N.C switchable
(GT2-71MCN/71MCP: HH and LL are not available.) |
| Analog output |
– |
4 to 20 mA, maximum load resistance: 350 Ω
Analog output range can be changed as desired. |
| Response time |
hsp (3 ms), 5 ms, 10 ms, 100 ms, 500 ms, 1 s |
Environmental resistance |
Ambient temperature |
-10 to +50ºC (14 to 122ºF) (GT2-71MCN/71MCP: -10 to +45ºC (14 to 113ºF) when expansion unit (s) is connected) |
| Relative humidity |
35 to 85% RH (No condensation) |
| Vibration |
10 to 55 Hz, 1.5 mm 0.06" double amplitude, 2 hours in each of X, Y, and Z directions |
| Materials |
Main body case: Polycarbonate, Key top: Polyacetal, Front sheet: PET, Cable: PVC |
| Weight |
GT2-71N/71P/72N/72P: Approx. 140 g (including power cable), GT2-71CN/71CP/72CN/72CP/71MCN/71MCP: Approx. 70 g |
| Accessories |
GT2-71N/71P/71CN/71CP/71MCN/71MCP: Instruction manual, Cover seal, GT2-72N/72P/72CN/72CP: None |
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| Panel mount type amplifier unit |
| Model |
NPN output |
GT2-75N |
GT2-76N |
GT2-100N |
GT2-E3N |
| PNP output |
GT2-75P |
GT2-76P |
GT2-100P |
GT2-E3P |
| Mounting method |
Panel mount |
Panel mount/Screw mounting using
optional mounting bracket |
Installed into GT2-100N/100P
(up to 3 boards) |
| Main unit / Expansion unit (1) |
Main unit |
Expansion unit |
2 channels provided as standard. Addition of expansion
boards allows expansion to 11 channels max. |
Expansion unit (1 to 3 channels) |
| Appearance |
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| Power supply voltage (1) |
10 to 30 VDC, including 10% ripple (P-P) |
20 to 30 VDC, including 10% ripple (P-P) |
Supplied from GT2-100N/100P |
Power
consumption (2) |
Normal |
2200 mW max. (30 V, 73.3 mA max.) |
4500 mW max. (30 V, 150 mA max.) |
4200 mW max. (30 V, 140 mA max.) |
| Power saving (Eco) |
1700 mW max. (30 V, 56.7 mA max.) |
3600 mW max. (30 V, 120 mA max.) |
4000 mW max. (30 V, 133.3 mA max.) |
| Display power |
Measured value display |
6 + 1/2-digit 7-segment LED (red) |
– |
| Other displays |
2-color, 13-level bar LED display (red, green), indicators (red, green) |
| Display range |
-199.999.9 to 199.999.9 |
| Display resolution |
0.1 μm 0.004 Mil |
| Sampling rate |
1000 times/sec. |
| Control input |
Timing input |
Non-voltage input (Contact, non-contact), Input time: 2 ms min. |
| Preset input |
Non-voltage input (Contact, non-contact), Input time: 20 ms min. |
| Reset input |
| Bank input |
Control
output |
HH / High / Go /
low / LL |
NPN/PNP open collector, non-voltage output, Applicable current: 50 mA,
Maximum applicable voltage (NPN: 40 V, PNP: 30 V)
Residual voltage at ON: 1 V max. * N.O./N.C switchable
(Applicable current decreases to 20 mA or lower when 2 or more sensor heads are connected to the GT2-100 Series.) |
| Response time |
hsp (3 ms), 5 ms, 10 ms, 100 ms, 500 ms, 1 s |
Environmental
resistance |
Ambient temperature |
-10 to +50ºC (14 to 122ºF) |
| Relative humidity |
35 to 85% RH (No condensation) |
| Vibration |
10 to 55 Hz, 1.5 mm 0.06" double amplitude, 2 hours in each of X, Y, and Z directions (GT2-100N/P: 0.15 mm 0.01" double amplitude) |
| Materials |
Main body case: Polycarbonate, Key top: Polyacetal, Front sheet: PET, Cable: PVC (GT2-75N/75P/76N/76P only) |
– |
| Power supply / I/O cable |
12-core connector connection (Connecting cable included) |
Power supply: Terminal block,
I/O: 20-pin connector (MIL standard) |
I/O: 30-pin connector (MIL standard) |
| Weight |
GT2-75N/75P/76N/76P: Approx. 140 g (including panel mounting bracket, protective front cover and power cable) |
| GT2-100N/100P: Approx. 380 g, GT2-E3N/E3P: Approx. 80 g |
| Accessories |
GT2-75N/75P: Panel mounting bracket, protective front cover, power cable, instruction manual, cover seal |
| GT2-76N/76P: Panel mounting bracket, protective front cover, power cable, expansion cable |
| GT2-100N/100P: Instruction manual, panel mounting bracket, GT2-E3N/E3P: None |
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*1 Precautions when the GT2-70 Series is used with an expansion unit (excluding GT2-71D)
Up to 15 amplifi er units can be connected; main unit: 1 unit, expansion unit: 14 units. To use the DIN-rail mount type and additional units, be sure to use the end units (OP-26751). When mounting additional units, depending on the number of units to be added, confi rm the following specifi cation limitations.
[Up to 8 units (including main unit)]
• The power supply voltage is 20 to 30 VDC.
• The maximum applicable current for each output is 20 mA.
[Up to 9 to 15 units (including main unit)]
• The power supply voltage is 20 to 30 VDC.
• The maximum applicable current for each output is 10 mA (including DL-RB1A output current).
*2 For GT2-100 Series, when the maximum number of sensor heads are connected and all units are set to power saving mode |
| DIN-rail mount type pulse output amplifier unit |
| Model |
GT2-71D |
| Appearance |
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| Mounting method |
DIN-rail mount |
| Power supply voltage |
10 to 30 VDC, including 10% ripple (P-P) |
| Current consumption |
1600 mW (30 V, 53.3 mA max.) |
| Indicator |
Power supply (green)/Alarm (red) indicator,
pulse output indicator (green), input indicator (green) |
| Pulse resolution |
Selectable from 0.1 μm 0.004 Mil, 0.5 μm 0.02 Mil, 1 μm 0.04 Mil, and 10 μm 0.39 Mil (Factory setting: 0.5 μm 0.02 Mil) |
| Minimum phase difference |
Selectable from 0.5 μs, 2.5 μs, 5 μs, and 25 μs (Factory setting: 2.5 μs) |
| Control input |
Origin return |
Input time: 20 ms min. |
| Output signal |
90º phase difference, differential square wave (EIA-422 compliant) |
| Output signal level |
+5V, øA, øA-, øB, øB-, øZ, øZ-: Line driver output |
Environmental
resistance |
Ambient temperature |
-10 to +50ºC (14 to 122ºF) |
| Relative humidity |
35 to 85% RH (No condensation) |
| Vibration |
10 to 55 Hz, 1.5 mm 0.06" double amplitude,
2 hours in each of X, Y, and Z directions |
| Material |
Main body case: Polycarbonate, Cable: PVC |
| Weight |
Approx. 110 g (including power supply cable) |
| Accessories |
Instruction manual, SW protection sticker |
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| Communication unit (common specifications) |
| Model |
DL-RB1A |
DL-RS1A |
| Appearance |
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| Power supply voltage |
20 to 30 VDC, including ripple,
Ripple (P-P): 10% max.
(Supplied via connected sensor amplifier) |
| Power consumption |
27 mA max. |
27 mA max. |
Number of connectable sensor
amplifiers |
Up to 15 units (including main unit) |
| Indicator |
Alarm indicator lamp
(red),
Power indicator lamp
(green) |
Communication
indicator lamp
(green x 2),
Alarm indicator lamp
(red),
Power indicator lamp
(green) |
Environmental
resistance |
Ambient temperature |
-10 to +55ºC (14 to 131ºF) |
| Relative humidity |
35 to 85% RH (No condensation) |
| Vibration |
10 to 55 Hz,
1.5 mm 0.06" double amplitude,
2 hours in each of X, Y, and Z directions |
| Material |
Main body case: Polycarbonate |
| Weight |
Approx. 46 g |
Approx. 53 g |
| Accessories |
Instruction manual, End units (x 2),
Switch protection seal,
Expansion connector cover |
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| Communication unit (DL-RS1A communication specifications) |
| Model |
DL-RS1A |
| Appearance |
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| Communication method |
Full duplex |
| Synchronization method |
Start-stop |
| Transmission code |
ASCII |
| Baud rate |
2400/4800/9600/19200/38400 bps
selectable (Factory-setting: 9600 bps) |
| Date bit length |
8-bit/7-bit selectable (Factory-setting: 8 bits) |
| Parity check |
None/Even/Odd selectable
(Factory- setting: None) |
| Stop bit length |
1 bit |
| Data delimiter |
Data reception: automatically recognizes CR
or CR+LF
Data transmission: Fixed to CR+LF |
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