To measure effective (functional) diameter, pitch diameter, major diameter, between M4 – 300mm. / No. 8 UN – 12″ diameter.
2 Point
3 Point
Ball Screw Threads
From Ø M10
External Threads
The Bowers XT500 large diameter 3-point bore-gauge has been designed specifically for the measurement of internal diameters between 300 and 500mm. The newly designed constant-force digital readout ensures that the measuring pressure remains constant throughout the measurement whilst radiussed measuring anvils provide optimum centralisation in the part. Anvil sets are supplied in 25mm steps (300-325, 325-350 etc) and each set has been manufactured to the exact toleranced size. The 300-325mm anvils are the master reference set and are used for setting the gauge in the setting ring. The other anvil sets are then fitted as required without further re-setting. This means that only one 300mm setting ring is required to set the gauge for all diameters in the full 300-500mm range of the instrument.
Features
Measuring range: 300-500mm
New constant-force digital readout
Single 300mm setting ring covers full range
Radiussed anvils of tool-steel for optimum centering
Accuracy: 15µm
Repeatability: 3µm
IP67 electronics
RS-232 output
Resolution 0.01/0.001mm. Metric/inch switchable
Fast accurate measurement
Extensions available for deeper bores
UKAS certificate with setting ring
Certificate of conformity with bore gauge
Supplied in fitted case
Individual Instruments
Supplied with digital display unit, measuring head with exchangeable anvils and setting ring with UKAS certificate
Code No.
Code No.(with BT)
Range (mm)
Accuracy (µm)
Depth (mm)
Setting Ring (mm)
XT5001M-XT3
XT5001M-BT
300-325
15
120
300
XT5002M-XT3
XT5002M-BT
300-325, 325-350
15
120
300
XT5003M-XT3
XT5003M-BT
300-325, 350-375
15
120
300
XT5004M-XT3
XT5004M-BT
300-325, 375-400
15
120
300
XT5005M-XT3
XT5005M-BT
300-325, 400-425
15
120
300
XT5006M-XT3
XT5006M-BT
300-325, 425-450
15
120
300
XT5007M-XT3
XT5007M-BT
300-325, 450-475
15
120
300
XT5008M-XT3
XT5008M-BT
300-325, 475-500
15
120
300
Sets
Supplied with digital display unit, measuring head with exchangeable anvils and setting ring with UKAS certificate
Code No.
Code No.(with BT)
Range (mm)
SXT3000M-XT3
SXT3000M-BT
300-400
SXT4000M-XT3
SXT4000M-BT
300-325, 400-500
SXT5000M-XT3
SXT5000M-BT
300-500
Data Transmission
Code No
Description
30-926-6721
Sylvac Proximity USB
25-604-064
Wireless Proximity Module Transmitter
25-604-001
USB Receiver
The new MicroGauge Two point bore gauge system has been designed specifically for the measurement of small bores between 1.0-10.0mm. Featuring a completely new digital readout and extremely compact overall dimensions, the MicroGauge is truly a pocket-sized instrument. Digital readout and measuring head together are about the same size and format as a ballpoint pen which represents a big advantage for those needing to measure small precision parts and who need to have their gauge with them all the time. The clear LCD display is easily set using only two buttons and results are shown with switchable 0.01/0.001/0.0005mm resolution. Data transfer is via Proximity-RS232 or Proximity-USB output. The measuring heads are equipped with spherical hard-chromed contact points and are set in appropriate setting rings. Like all Bowers bore gauging products the MicroGauge system is available as individual instruments or as full sets. All setting rings are supplied as standard with UKAS certification.
Features
System range: 1-10mm
New slimline digital display
Switchable resolution 0.01/0.001/0.0005mm
Simple 2-button operation
Clear LCD display
Data output: RS232 / USB proximity sensor
Linearity: Diameter 1.0-1.5 max 2% of measuring travel, min 0.001mm.
Diameter 1.5-10 max 1% of measuring travel, min 0.001mm
Repeatability: 0.001mm
Available as individual instruments or sets
UKAS-certificates as standard with all setting rings
Hard-chromed ball-contacts
Depth-stops available
Stand available as an option
Technical Specification
Individual measuring heads, readouts and setting rings
Code No.
Range (mm)
Range (inch)
Measuring Depth (mm)
Setting Ring (mm)
MG011W
0.95-1.15
0.037-0.045
0.6-11
1.00
MG012W
1.07-1.25
0.042-0.049
0.6-11
1.10
MG013W
1.17-1.35
0.046-0.053
0.6-11
1.20
MG014W
1.27-1.45
0.050-0.057
0.6-11
1.30
MG015W
1.37-1.55
0.054-0.061
0.6-11
1.40
MG016W
1.50-1.90
0.059-0.075
0.9-17
1.75
MG017W
1.80-2.20
0.071-0.087
0.9-17
2.00
MG018W
2.05-2.45
0.081-0.096
0.9-17
2.25
MG019W
2.25-2.75
0.089-0.108
1.2-22
2.50
MG020W
2.50-3.00
0.098-0.118
1.2-22
2.75
MG021W
2.75-3.25
0.108-0.128
1.2-22
3.00
MG022W
3.00-3.50
0.118-0.138
1.2-22
3.25
MG023W
3.25-3.75
0.128-0.148
1.2-22
3.50
MG024W
3.50-4.00
0.138-0.157
1.2-22
3.75
MG025W
3.75-4.25
0.148-0.167
1.2-22
4.00
MG026W
3.65-4.35
0.144-0.171
2.0-40
4.00
MG027W
4.15-4.85
0.163-0.191
2.0-40
4.50
MG028W
4.65-5.35
0.183-0.211
2.0-40
5.00
MG029W
5.15-5.85
0.203-0.230
2.0-40
5.50
MG030W
5.65-6.35
0.222-0.250
2.0-40
6.00
MG031W
6.15-6.85
0.242-0.270
2.0-40
6.50
MG032W
6.65-7.35
0.262-0.290
2.0-40
7.00
MG033W
7.15-7.85
0.281-0.309
2.0-40
7.50
MG034W
7.65-8.35
0.301-0.329
2.0-40
8.00
MG035W
8.15-8.85
0.321-0.349
2.0-50
8.50
MG036W
8.65-9.35
0.340-0.368
2.0-50
9.00
MG037W
9.15-9.85
0.360-0.388
2.0-50
9.50
MG038W
9.65-10.35
0.380-0.408
2.0-50
10.00
Sets
Including digital readout, measuring heads and setting rings with UKAS certificate
Code No.
Range (mm)
SMG001M
0.95-1.55
SMG005M
6.15-10.35
SMG002M
1.50-2.45
SMG003M
2.25-4.25
SMG004M
3.65-6.35
Large Sets
Including digital readout, measuring heads and setting rings with UKAS certificate
Code No.
Range (mm)
SMG010M
0.95-2.45
SMG011M
1.50-4.25
SMG012M
2.25-6.35
Standard Depth Stop
Code No.
Range (mm)
MGSTOP1
0.95-1.55
MGSTOP2
1.50-2.45
MGSTOP3
2.25-4.25
MGSTOP4
3.65-6.35
MGSTOP5
6.15-10.35
Data Transmission
Code No
Description
30-926-6721
Sylvac Proximity USB
25-604-064
Wireless Proximity Module Transmitter
25-604-001
USB Receiver
Bowers’ XT3 Three Point Pistol Grip Digital Bore Gauge Holematic offers a new ergonomic design – including a larger and clearer LCD display – along with IP67 electronics protection, proximity output with built-in Bluetooth; allowing bi-directional communication giving greater flexibility for data acquisition and storage. The extended mechanical travel of the XT range means that special heads can also be manufactured to accommodate users most awkward measuring problems. Measuring heads for threads, splines slots, grooves, deep-holes and many more applications are available on request.
The Bowers XT3 range can be supplied as individual instruments or in complete sets, with UKAS certification of both measuring head and setting ring as standard.
Features
Ergonomic design with larger and clearer LCD swivel display
IP67 Electronics
Simple 2-button operation
4 preset memories
Proximity output with built-in Bluetooth
Bi-directional communication
Self-centring heads
Fast, accurate measurement
Range 2–300mm (0.080” – 12”)
2-6mm 2 point/ 6-300mm 3 point measurement
Resolution 0.001mm/0.00005”
Tungsten carbide measuring faces on all 3-point heads from 12.5mm
Blind bore measurement from 2mm – 6mm and above 12.5mm (0.500”)
Extensions available above 6mm for deep hole measurement
Setting rings included with individual instruments and sets
UKAS certificates supplied as standard with all setting rings and gauges
Serial number on all digital readouts and measuring heads
Heads with special anvils available to suit specific customer requirements (e.g. Threads, grooves, 2-point, spherical, splines etc)
Bore gauges manufactured according to DIN 863, part 4
Supplied in fitted wooden case
Technical Specification
Individual instruments supplied with digital pistol grip, head, ring and UKAS
Code No.
Code No. (with BT)
Range (mm)
Accuracy (mm)
Depth (mm)
Setting Ring (mm)
XTH1M-XT3
XTH1M-BT
2-2.5
0.004
9
2.50
XTH2M-XT3
XTH2M-BT
2.5-3
0.004
9
2.50
XTH3M-XT3
XTH3M-BT
3-4
0.004
12
4.00
XTH4M-XT3
XTH4M-BT
4-5
0.004
18
4.00
XTH5M-XT3
XTH5M-BT
5-6
0.004
18
5.00
XTH6M-XT3
XTH6M-BT
6-8
0.004
58
8.00
XTH8M-XT3
XTH8M-BT
8-10
0.004
58
8.00
XTH10M-XT3
XTH10M-BT
10-12.5
0.004
58
12.50
XTH12M-XT3
XTH12M-BT
12.5-16
0.004
62
12.50
XTH16M-XT3
XTH16M-BT
16-20
0.004
62
20.00
XTH20M-XT3
XTH20M-BT
20-25
0.004
66
20.00
XTH25M-XT3
XTH25M-BT
25-35
0.004
66
35.00
XTH35M-XT3
XTH35M-BT
35-50
0.004
80
35.00
XTH50M-XT3
XTH50M-BT
50-65
0.005
80
65.00
XTH65M-XT3
XTH65M-BT
65-80
0.005
80
65.00
XTH80M-XT3
XTH80M-BT
80-100
0.005
100
80.00
XTH100M-XT3
XTH100M-BT
100-125
0.006
115
125.00
XTH125M-XT3
XTH125M-BT
125-150
0.006
115
125.00
XTH150M-XT3
XTH150M-BT
150-175
0.007
115
175.00
XTH175M-XT3
XTH175M-BT
175-200
0.007
115
175.00
XTH200M-XT3
XTH200M-BT
200-225
0.008
118
225.00
XTH225M-XT3
XTH225M-BT
225-250
0.008
118
225.00
XTH250M-XT3
XTH250M-BT
250-275
0.009
118
275.00
XTH275M-XT3
XTH275M-BT
275-300
0.009
118
275.00
Code No.
Code No.(with BT)
Range (inch)
Accuracy (inch)
Depth (inch)
Setting Ring (inch)
XTH1i-XT3
XTH1i-BT
0.080-0.100
0.00015
0.35
0.1000
XTH2i-XT3
XTH2i-BT
0.100-0.120
0.00015
0.35
0.1000
XTH3i-XT3
XTH3i-BT
0.120-0.160
0.00015
0.47
0.1600
XTH4i-XT3
XTH4i-BT
0.160-0.200
0.00015
0.70
0.1600
XTH5i-XT3
XTH5i-BT
0.200-0.250
0.00015
0.70
0.2000
XTH6i-XT3
XTH6i-BT
1/4-5/16
0.00015
2.28
0.3125
XTH8i-XT3
XTH8i-BT
5/16-3/8
0.00015
2.28
0.3125
XTH10i-XT3
XTH10i-BT
3/8-1/2
0.00015
2.28
0.500
XTH12i-XT3
XTH12i-BT
1/2-5/8
0.00015
2.44
0.500
XTH16i-XT3
XTH16i-BT
5/8-3/4
0.00015
2.44
0.750
XTH20i-XT3
XTH20i-BT
3/4-1
0.00015
2.62
0.750
XTH25i-XT3
XTH25i-BT
1-1 3/8
0.00015
2.62
1.375
XTH35i-XT3
XTH35i-BT
1 3/8-2
0.00015
3.15
1.375
XTH50i-XT3
XTH50i-BT
2-2 5/8
0.00020
3.15
2.625
XTH65i-XT3
XTH65i-BT
2 5/8-3 1/4
0.00020
3.15
2.625
XTH80i-XT3
XTH80i-BT
3 1/4-4
0.00020
3.35
3.250
XTH100i-XT3
XTH100i-BT
4-5
0.00025
3.94
5.000
XTH125i-XT3
XTH125i-BT
5-6
0.00025
3.94
5.000
XTH150i-XT3
XTH150i-BT
6-7
0.00030
3.94
7.000
XTH175i-XT3
XTH175i-BT
7-8
0.00030
3.94
7.000
XTH200i-XT3
XTH200i-BT
8-9
0.00030
3.94
9.000
XTH225i-XT3
XTH225i-BT
9-10
0.00030
4.05
9.000
XTH250i-XT3
XTH250i-BT
10-11
0.00035
4.05
11.000
XTH275i-XT3
XTH275i-BT
11-12
0.00035
4.05
11.000
Sets
Supplied with digital pistol grip, head, rings and UKAS
Code No.
Code No.(with BT)
Range (mm)
SXTH1M-XT3
SXTH1M-BT
2-6
SXTH3M-XT3
SXTH3M-BT
6-10
SXTH4M-XT3
SXTH4M-BT
10-20
SXTH5M-XT3
SXTH5M-BT
20-50
SXTH6M-XT3
SXTH6M-BT
50-100
SXTH7M-XT3
SXTH7M-BT
100-150
SXTH8M-XT3
SXTH8M-BT
150-200
Code No.
Code No.(with BT)
Range (inch)
SXTH1i-XT3
SXTH1i-BT
0.080-0.250
SXTH3i-XT3
SXTH3i-BT
1/4-3/8
SXTH4i-XT3
SXTH4i-BT
3/8-3/4
SXTH5i-XT3
SXTH5i-BT
3/4-2
SXTH6i-XT3
SXTH6i-BT
2-4
SXTH7i-XT3
SXTH7i-BT
4-6
SXTH8i-XT3
SXTH8i-BT
6-8
Large Sets
Supplied with digital pistol grip, head, rings and UKAS
Code No.
Code No.(with BT)
Range (mm)
SXTH10M-XT3
SXTH10M-BT
6-20
SXTH11M-XT3
SXTH11M-BT
20-100
SXTH9M-XT3
SXTH9M-BT
100-200
Code No.
Code No.(with BT)
Range (inch)
SXTH10i-XT3
SXTH10i-BT
1/4-3/4
SXTH11i-XT3
SXTH11i-BT
3/4-4
SXTH9i-XT3
SXTH9i-BT
4-8
Extensions
Code No.
Length (mm)
Length (inch)
To Fit Heads (mm)
To Fit Heads (inch)
EGX0200
63
2.5
6-10
1/4-3/8
EGX0004
150
6.0
50-300
2-12
EGX0500
100
4.0
12.5-20
1/2-3/4
EGX0001
150
6.0
20-50
3/4-2
EGX0400
76
3.0
10-12.5
3/8-1/2
Depth Stop
Code No
Range (mm)
Range (inch)
DSTOP01
2-6
0.080-0.25
Bowers’ Bluetooth digital internal micrometers offer a new ergonomic design – including a larger and clearer LCD display – along with IP67 electronics protection, proximity output; allowing bi-directional communication giving greater flexibility for data acquisition and storage. The extended mechanical travel of the XT range means that special heads can also be manufactured to accommodate users most awkward measuring problems. Measuring heads for threads, splines slots, grooves, deep-holes and many more applications are available on request.
The Bowers XT3 range can be supplied as individual instruments or in complete sets, with UKAS certification of both measuring head and setting ring as standard.
Features
Eergonomic design with larger and clearer LCD display
IP67 Electronics
Simple 2-button operation
4 preset memories
Proximity output with built-in Bluetooth
Bi-directional communication
Range 2-300mm (0.080” – 12”)
2-6mm 2 point/ 6-300mm 3 point measurement
Resolution 0.001mm/0.00005”
Tungsten carbide measuring faces on all 3-point heads from 12.5mm
Blind bore measurement from 2mm – 6mm and above 12.5mm (0.500”)
Extensions available above 6mm for deep hole measurement
Ratchet stop to ensure consistent measurement
Setting rings included with individual instruments and sets
UKAS certificates supplied as standard with all setting rings and gauges
Serial number on all digital readouts and measuring heads
Heads with special anvils available to suit specific customer requirements (e.g. Threads, grooves, 2-point, spherical, splines etc)
Bore gauges manufactured according to DIN 863, part 4
Supplied in fitted wooden case
Technical Specification
Code No.
Code No.(with BT)
Range (mm)
Accuracy (mm)
Depth (mm)
Setting Ring (mm)
XTD1M-XT3
XTD1M-BT
2-2.5
0.004
9
2.50
XTD2M-XT3
XTD2M-BT
2.5-3
0.004
9
2.50
XTD3M-XT3
XTD3M-BT
3-4
0.004
12
4.00
XTD4M-XT3
XTD4M-BT
4-5
0.004
18
4.00
XTD5M-XT3
XTD5M-BT
5-6
0.004
18
5.00
XTD6M-XT3
XTD6M-BT
6-8
0.004
58
8.00
XTD8M-XT3
XTD8M-BT
8-10
0.004
58
8.00
XTD10M-XT3
XTD10M-BT
10-12.5
0.004
58
12.50
XTD12M-XT3
XTD12M-BT
12.5-16
0.004
62
12.50
XTD16M-XT3
XTD16M-BT
16-20
0.004
62
20.00
XTD20M-XT3
XTD20M-BT
20-25
0.004
66
20.00
XTD25M-XT3
XTD25M-BT
25-35
0.004
66
35.00
XTD35M-XT3
XTD35M-BT
35-50
0.004
80
35.00
XTD50M-XT3
XTD50M-BT
50-65
0.005
80
65.00
XTD65M-XT3
XTD65M-BT
65-80
0.005
80
65.00
XTD80M-XT3
XTD80M-BT
80-100
0.005
100
80.00
XTD100M-XT3
XTD100M-BT
100-125
0.006
115
125.00
XTD125M-XT3
XTD125M-BT
125-150
0.006
115
125.00
XTD150M-XT3
XTD150M-BT
150-175
0.007
115
175.00
XTD175M-XT3
XTD175M-BT
175-200
0.007
115
175.00
XTD200M-XT3
XTD200M-BT
200-225
0.008
118
225.00
XTD225M-XT3
XTD225M-BT
225-250
0.008
118
225.00
XTD250M-XT3
XTD250M-BT
250-275
0.009
118
275.00
XTD275M-XT3
XTD275M-BT
275-300
0.009
118
275.00
Code No.
Code No.(with BT)
Range (inch)
Accuracy (inch)
Depth (inch)
Setting Ring (inch)
XTD1i-XT3
XTD1i-BT
0.080-0.100
0.00015
0.35
0.1000
XTD2i-XT3
XTD2i-BT
0.100-0.120
0.00015
0.35
0.1000
XTD3i-XT3
XTD3i-BT
0.120-0.160
0.00015
0.47
0.1600
XTD4i-XT3
XTD4i-BT
0.160-0.200
0.00015
0.70
0.1600
XTD5i-XT3
XTD5i-BT
0.200-0.250
0.00015
0.70
0.2000
XTD6i-XT3
XTD6i-BT
1/4-5/16
0.00015
2.28
0.3125
XTD8i-XT3
XTD8i-BT
5/16-3/8
0.00015
2.28
0.3125
XTD10i-XT3
XTD10i-BT
3/8-1/2
0.00015
2.28
0.500
XTD12i-XT3
XTD12i-BT
1/2-5/8
0.00015
2.44
0.500
XTD16i-XT3
XTD16i-BT
5/8-3/4
0.00015
2.44
0.750
XTD20i-XT3
XTD20i-BT
3/4-1
0.00015
2.62
0.750
XTD25i-XT3
XTD25i-BT
1-1 3/8
0.00015
2.62
1.375
XTD35i-XT3
XTD35i-BT
1 3/8-2
0.00015
3.15
1.375
XTD50i-XT3
XTD50i-BT
2-2 5/8
0.00020
3.15
2.625
XTD65i-XT3
XTD65i-BT
2 5/8-3 1/4
0.00020
3.15
2.625
XTD80i-XT3
XTD80i-BT
3 1/4-4
0.00020
3.94
3.250
XTD100i-XT3
XTD100i-BT
4-5
0.00025
4.53
5.000
XTD125i-XT3
XTD125i-BT
5-6
0.00025
4.53
5.000
XTD150i-XT3
XTD150i-BT
6-7
0.00030
4.53
7.000
XTD175i-XT3
XTD175i-BT
7-8
0.00030
4.53
7.000
XTD200i-XT3
XTD200i-BT
8-9
0.00030
4.65
9.000
XTD225i-XT3
XTD225i-BT
9-10
0.00030
4.65
9.000
XTD250i-XT3
XTD250i-BT
10-11
0.00035
4.65
11.000
XTD275i-XT3
XTD275i-BT
11-12
0.00035
4.65
11.000
Sets
Supplied with one digital display unit, heads, rings, and UKAS
Code No.
Code No. (with BT)
Range (mm)
SXTD1M-XT3
SXTD1M-BT
2-6
SXTD3M-XT3
SXTD3M-BT
6-10
SXTD4M-XT3
SXTD4M-BT
10-20
SXTD5M-XT3
SXTD5M-BT
20-50
SXTD6M-XT3
SXTD6M-BT
50-100
SXTD7M-XT3
SXTD7M-BT
100-150
SXTD8M-XT3
SXTD8M-BT
150-200
SXTD9M-XT3
SXTD9M-BT
100-200
Code No.
Code No.(with BT)
Range (inch)
SXTD1i-XT3
SXTD1i-BT
0.080-0.250
SXTD3i-XT3
SXTD3i-BT
1/4-3/8
SXTD4i-XT3
SXTD4i-BT
3/8-3/4
SXTD5i-XT3
SXTD5i-BT
3/4-2
SXTD6i-XT3
SXTD6i-BT
2-4
SXTD7i-XT3
SXTD7i-BT
4-6
SXTD8i-XT3
SXTD8i-BT
6-8
SXTD9i-XT3
SXTD9i-BT
4-8
Depth Stop
Code No
Range(mm)
Range(inch)
DSTOP01
2-6
0.080-0.25
Sets
Supplied with digital display with each heads, rings, and UKAS
Code No.
Range (mm)
Note
SXTD3U-BT
6-10
with 2 display units
SXTD4U-BT
10-20
with 3 display units
SXTD5U-BT
20-50
with 3 display units
SXTD6U-BT
50-100
with 3 display units
Extensions
Code No.
Length (mm)
Length (inch)
To Fit Heads (mm)
To Fit Heads (inch)
EGX0200
63
2.5
6-10
1/4-3/8
EGX0004
150
6.0
50-300
2-12
EGX0500
100
4.0
12.5-20
1/2-3/4
EGX0001
150
6.0
20-50
3/4-2
EGX0400
76
3.0
10-12.5
3/8-1/2
XTA MICRO : Analogue Bore Gauges
Code No.
Range (mm)
Accuracy (mm)
Depth (mm)
Setting Ring (mm)
XTA1M
2-2.5
0.004
9
2.50
XTA2M
2.5-3
0.004
9
2.50
XTA3M
3-4
0.004
12
4.00
XTA4M
4-5
0.004
18
4.00
XTA5M
5-6
0.004
18
5.00
XTA8M
8-10
0.004
58
8.00
XTA6M
6-8
0.004
58
8.00
XTA10M
10-12.5
0.004
58
12.50
XTA12M
12.5-16
0.004
62
12.50
XTA16M
16-20
0.004
62
20.00
XTA Micro Analogue Bore Gauge – Imperial
Features
More compact mechanical controller
Lighter and ergonomically designed
Improved functionality
Vernier scale added to improve resolution from 5µ to 2µ
Graduation: 2-6mm range – 0.001mm. 0.080”-1/4” range: 0.0001”
Graduation: 6-20mm range – 0.002mm. 1/4”-3/4” range: 0.0001”
The Bowers XT500 large diameter 3-point bore-gauge has been designed specifically for the measurement of internal diameters between 300 and 500mm. The newly designed constant-force digital readout ensures that the measuring pressure remains constant throughout the measurement whilst radiussed measuring anvils provide optimum centralisation in the part. Anvil sets are supplied in 25mm steps (300-325, 325-350 etc) and each set has been manufactured to the exact toleranced size. The 300-325mm anvils are the master reference set and are used for setting the gauge in the setting ring. The other anvil sets are then fitted as required without further re-setting. This means that only one 300mm setting ring is required to set the gauge for all diameters in the full 300-500mm range of the instrument.
