STT402L Theodolite
Stonex
Surveying Equipment

STT402L Theodolite

Stonex 2” Electronic high accuracy Theodolite

STT402L offers the opportunity to challenge high-precision monitoring and engineering works. Thanks to its absolute encoder, angle measurements are saved when STT402L is switched off. Low power consumption gives more than 80 hours working time. Unlike other instruments that use only AA battery, STT402L offers the options to use the Li-Ion rechargeable battery or standard AA battery. The dual axis compensator with 1” accuracy ensures reliable measurements on every kind of terrain. In addition, the large ergonomic keypad and the backlit LCD display allows the Surveyor to be extremely productive in the field works. Also the reticle is illuminated permitting to work inside tunnels and buildings. By pressing one key STT402L converts vertical angles to percent of grade, locks the horizontal angle, resets the horizontal angle to zero offering the possibility to reposition or repeat a measurement. The continuously reading program with average calculations gives a 100% error free reading on both the circles. Stonex STT402L comes with a complete set of accessories including the carrying case, battery and charger, adjusting tools.

Key Performance & Features

Advanced Capabilities

1

Uses both Li-Ion rechargeable and AA battery

Flexible power options providing more than 80 hours of continuous field working time.

2

All purpose instrument, suitable for any kind of field work

Ideal for high-precision monitoring, construction layout, and engineering projects.

3

Ergonomic keypad and backlighed LCD display

Large backlit display and illuminated reticle permitting work inside tunnels and dark buildings.

4

Easy to use, most of the functions with one key

One-key conversion for vertical angles to percent of grade, horizontal angle lock, and zero reset.

5

IP 55 water & dust protection

Rugged environmental sealing protecting against water jets and field dust.

Technical Specifications

TELESCOPE

ImageErect
Magnification30x
Objective apertureΦ 45mm
Field of view1° 30'
Minimum focusing distance1.0 m
Stadia multiplication constant100
Stadia addition constant0

ANGLE MEASURING & COMPENSATION

Reading systemAbsolute Encoding
Minimum reading1" (0.2 Mgon)
Accuracy¹2"
Automatic CompensatorDual Axis
Range±3'
Accuracy1"

LEVELS

Plate level accuracy30"/2mm
Circular level accuracy8'/2mm

DISPLAY

LCD on both sidesBacklit
ReticleIlluminated

LASER PLUMMET

Accuracy±1.0mm / 1.5m
Laser class/waveClass 2 / IEC60825-1 / 635nm

POWER SUPPLY

Battery6V Li-Ion / 4 units AA battery
Operating time
80 hrs Li-Ion battery24 hrs AA battery

PHYSICAL SPECIFICATION

Dimensions153 mm × 175 mm × 340mm
Weight4.5 kg
Operating Temperature-20°C to 50°C (-4°F to 122°F)
Waterproof/DustproofIP55
Serial interfaceRS 232
Optional AccessoriesDiagonal eyepiece, battery charger