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SOKKIA
Surveying Levels
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BACK
Total Stations
Optical
Theodolites Digital
Theodolites Data
Collectors |
PL1 Tilting Level |
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PL1
Tilting level
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Meets
first-order specifications for repeatability of line of sight. |
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Accuracy
is ensured by the tubular vial, sensitive to 10 seconds / 2mm. |
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A
“coincidence system” makes it easy to center the bubble. |
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The
optical parallel plate micrometer reads to .001 in. (0.1mm). |
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Choose
either inch-reading or metric.
SPECIFICATIONS |
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B20/B21 Automatic Levels |
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B20/B21
Automatic levels |
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Achieve
an accuracy of ± .004 ft. in one mile of double-run leveling with
the B20; the B21 provides an accuracy of ± .006 ft. You can even
improve on those numbers with an optional micrometer! |
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The
endless tangent horizontal drive allows fast, precise operation. |
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A
collimator-type sight lets you quickly and accurately point the
instrument. |
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Horizontal
circles are graduated in degrees to 360°.
SPECIFICATIONS |
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B1/B1C Automatic Levels |
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B1/B1C
Automatic levels |
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Achieve
an accuracy of ± .003 ft. in 1 mile of double-run leveling (± .002
ft. with the optional OM1F parallel plate micrometer). |
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Two-speed
focusing lets you sight faster than other levels. |
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A
collimator-type peep sight ensures quick, accurate pointing. |
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The
B1C’s horizontal glass circle is read optically through the micro
scope—direct to 10', and by estimation to 1'. Circle is graduated
in degrees to 360°
SPECIFICATIONS |
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Ordering
Information |
7375-50
PL1 Precise Level (metric reading), complete with SE14A carrying
case, screwdriver, adjusting pins, lens brush, lens cap, dust cover, and
operation manual.
7375-51 PL1E Precise Level (inch reading), complete with same
equipment as above.
7372-50 B1 Precision Automatic Level, 1:100 stadia, complete with
hermetically sealed SE8 case, adjusting pin, screw- driver, lens cap,
rain cover, and operation manual.
7372-00 B1 Precision Automatic Level, 0.3:100 stadia, with same
equipment as
7372-50.
7372-55 B1C Precision
Automatic Level, 1:100 stadia with horizontal circle, plumb bob and same
equipment as 7372-50.
7372-05 B1C Precision Automatic Level, 0.3:100 stadia with
horizontal circle, plumb bob and same equipment as 7372-50.
7382-60 B20 Automatic Level, complete with high-visibility fitted
SE35 carrying case with shoulder strap, plumb bob, tool kit, lens cap,
rain cover, and operation manual.
7381-60 B21 Automatic Level, with same equipment as 7382-60. |
| Accessories
7311-06 LA8
Illumination Unit - B20, B21
7311-11 LA4 Illumination Unit - B1, B1C
7372-14 OM1F Optical Micrometer - B1, B1C (feet)
7372-15 OM1 Optical Micrometer - B1, B1C (metric)
7372-20 OM5F Optical Micrometer - B20, B21 (feet)
7372-21 OM5 Optical Micrometer - B20, B21 (metric)
7311-06 LA8 Illumination Unit - B20, B21
7329-46 EL5 40x eyepiece - B20 |
PL1,
B1/B1C, B20, B21 Quick Specs
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| Telescope |
PL1 |
B1/B1C |
B20 |
B21 |
| Image |
Erect |
Erect |
Erect |
Erect |
| Magnification |
42x |
32x |
32x
or 40x (opt.) |
30x |
| Resolving
Power |
2” of
arc |
3" |
n/a |
n/a |
| Field
of View |
1°
10' (2.0 ft. @ 100 ft.) |
1°
20’ (2.3 ft. @ 100 ft.) |
1°
20’ (2.3 ft. @ 100 ft.) |
1°
20’ (2.3 ft. @ 100 ft.) |
| Minimum
Focus |
6.6
ft. (2m) |
7.5
ft. (2.3m) |
1
ft. (0.3m) |
1
ft. (0.3m) |
| Stadia
Ratio |
1:100 |
0.3:100
or 1:100 |
1:100 |
1:100 |
| Compensator
— PL1 (split-image tubular vial); all others (wire-hung;
magnetically damped) |
| Setting
Accuracy |
n/a |
0.3" |
0.3" |
0.5" |
| Range |
n/a |
±10' |
±
15' |
±
15' |
| Leveling
Accuracy (all models)—in 1.0 km (1 mile) of double-run leveling |
Standard
Deviation
|
±
0.2mm /
001 ft. |
±
0.8mm /
.003 ft. |
±
1.0mm /
.004 ft. |
±
1.5mm /
.006 ft. |
| w/
micrometer |
.001
in (0.1m) |
±
0.5mm /
.002 ft. |
±
0.8mm /
.003 ft. |
±
1.2mm /
.005 ft. |
| Level
Vial (all models) — circular |
| Sensitivity |
3.5'
/ 2mm |
10'
/ 2mm |
10'
/ 2mm |
10'
/ 2mm |
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