Sokkia B20/21

B20/B21 Automatic levels
  • 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!
  • The endless tangent horizontal drive allows fast, precise operation.
  • A collimator-type sight lets you quickly and accurately point the instrument.
  • Horizontal circles are graduated in degrees to 360

 
SALE PRICING!

SK-7382-60B20

 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.
$1,190
sale price!


or call
1-800-821-1954
to order

SK-7382-60B21

 B21 Automatic Level, complete with high-visibility fitted SE35 carrying case with shoulder strap, plumb bob, tool kit, lens cap, rain cover, and operation manual.
$990
sale price!


or call
1-800-821-1954
to order
Technical Specifications
Telescope B20 B21
Image Erect Erect
Magnification 32x or 40x (opt.) 30x
Resolving Power n/a n/a
Field of View 1° 20’ (2.3 ft. @ 100 ft.) 1° 20’ (2.3 ft. @ 100 ft.)
Minimum Focus 1 ft. (0.3m) 1 ft. (0.3m)
Stadia Ratio 1:100 1:100
Compensator — PL1 (split-image tubular vial); all others (wire-hung; magnetically damped)
Setting Accuracy 0.3" 0.5"
Range ± 15' ± 15'
Leveling Accuracy (all models)—in 1.0 km (1 mile) of double-run leveling
Standard Deviation
 ± 1.0mm /
.004 ft.		 ± 1.5mm /
.006 ft.
w/ micrometer ± 0.8mm /
.003 ft.		 ± 1.2mm /
.005 ft.
Level Vial (all models) — circular
Sensitivity 10' / 2mm 10' / 2mm
Accessories
SK-7311-06 LA8 Illumination Unit - B20, B21
$225.00
SK-7311-11 LA4 Illumination Unit - B1, B1C
$230.00
SK-7372-14 OM1F Optical Micrometer - B1, B1C (feet)
$1080.00
SK-7372-15 OM1 Optical Micrometer - B1, B1C (metric)
$1080.00
SK-7372-20 OM5F Optical Micrometer - B20, B21 (feet)
$1080.00
SK-7372-21 OM5 Optical Micrometer - B20, B21 (metric)
$1080.00
SK-7329-46 EL5 40x eyepiece - B20
$160.00

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