A total station is an electronic/optical instrument used in modern surveying. The total station is an electronic theodolite (transit) integrated with an electronic distance meter (EDM) to read slope distances from the instrument to a particular point.
Total Station systems has the advantages such as high efficiency, simplicity and convenience in operation, low power consumption, small weight and sizes, an opportunity of use on a tripod, in a backpack.
| Description | HTS-220R | HTS-420R | HTS-420L6 | 
| Angle Mesasurement | |||
| Measurement Method | Absolute Encoding | ||
| Minimum Readout | 1” | ||
| Accuracy*1 | 2” | ||
| Telescope | |||
| Magnification | 30X | ||
| Field of view | 1°30’ (2.7m at 100m) | ||
| Minimum Focusing Distance | 1.5m | ||
| Reticle | illuminated | ||
| Compensator | Liquid Tilt Sensor | ||
| System | Single Axis | Dual Axis | Dual Axis | 
| Working | ±3’ | ||
| Setting Accuracy | 1” | ||
| Distance Measurement (Reflector Less) | |||
| Reflector Less Range*2 | 350m | 350m | 600m | 
| Single Prism | 5500m | 7500m | |
| Accuracy | 3mm+2ppm | ||
| Measuring | 1.5s | ||
| Distance Measurement (With Reflector) | |||
| Single Prism Under good condition*3 | 2500/3000m | 3000m | 4000/5000m | 
| Reflective Sheet | 800m | 1000m | |
| Accuracy | 2mm+2ppm | ||
| Measuring Time (Fine/Quick/Tracking) | 1.5s/1.2s/0.8s | 1.3/1s/0.5s | 1s/0.8s/0.5s | 
| Communication | |||
| Wireless Communication | None | Bluetooth | |
| Interface | Standard RS232,SD-Card*4, Micro USB | ||
| Internal Data Memory | Approximate 20000 Points | ||
| Data Format | ASCII | ||
| Operation | |||
| Operating System | Real Time Operating System | ||
| Display | Gray and white Display with adjustable contrast 280 x 160 pixel | ||
| Keyboard | 2 Sides alphanumeric backlit crystal keyboard | ||
| Laser Plummet | |||
| Type | Laser point, 4 brightness level adjustment | ||
| Centering Accuracy | 1mm at 1.5m Instrument height | ||
| Environmental Condition | |||
| Operating Temperature | -20°c to +50°c | ||
| Storage Temperature | -40°c to +70°c | ||
| Dust & Water proof( IEC60529 standard ) | IP55 | IP65 | |
| Power Supply | |||
| Battery Type | Rechargeable Li-Ion Battery | ||
| Voltage/Capacity | ZBA-400 7.4V DC / 3000mAh | ||
| Operating Time with ZBA-400 | Optimal 16hr*5 (continuous angle measurement every 30 sec. / 10 hr Typical) | ||
| Measuring Time | Approx. 12000 times | ||
| Weight | |||
| Including Battery and Tribach | 5.5 Kg Approx. | ||