CHCNAV i76 Palm Visual IMU-RTK GNSS

Small in size, big in features. The CHCNAV i76 combines precise GNSS RTK positioning, advanced IMU technology, and two wide-angle cameras into a highly compact measurement solution. Weighing only 450 grams, the i76 is easy to carry and enables accurate measurement, visual positioning, and CAD-based stakeout directly in the field.

Measure accurately – without unnecessary adjustments

The i76’s 5th generation Ultra-IMU enables automatic tilt compensation with up to 60 degrees of tilt. The survey pole does not need to be perfectly vertical, which speeds up point collection and facilitates work in uneven terrain and construction sites.

Key Benefits

• GNSS RTK, IMU, and visual measurement in one device
• Extremely compact and only 450g design
• 1892-channel GNSS receiver
• RTK accuracy up to 0.8 cm + 1 ppm (H)
• 200 Hz 5th generation Ultra-IMU
• Automatic tilt compensation up to 60°
• Two 2 MP wide-angle cameras
• CAD + AR-based visual stakeout
• Visual navigation and measurement
• Built-in 410–470 MHz UHF radio
• Operating time as RTK rover up to 17 hours
• IP68 protection and 2-meter drop resistance

Visual measurement everywhere

The i76's two 2-megapixel cameras offer a 95-degree field of view and integrate visual measurement into traditional GNSS workflows. The cameras enable visual navigation and CAD-based AR stakeout, where the design can be seen overlaid on the real environment.

This facilitates, for example, the stakeout of pipelines, building foundations, boundaries, and other planned objects. According to the manufacturer, CAD + AR stakeout can improve work efficiency by up to 40 percent.

Accurate positioning for challenging conditions

The i76 utilizes full GNSS system support and 1892 channels. CHCNAV iStar 2.0 technology and the updated StellaX GNSS chip are designed to improve signal tracking and interference immunity in challenging environments.

According to the manufacturer, the i76 achieves over 96 percent reliable fixed RTK solutions, even in areas of high solar activity.

5th Generation Ultra-IMU

The 200 Hz Ultra-IMU makes the i76 a fast and flexible measurement solution. Thanks to tilt compensation, measurements can be taken even when the survey pole is not perfectly vertical.

Up to 60 degrees of tilt can be automatically compensated, reducing the need for bubble leveling and making measurements easier in confined, uneven, and difficult-to-reach locations.

CAD + AR – design visible directly in the field

The combination of the i76 and LandStar software integrates CAD data into visual stakeout. The AR view helps to visualize the location and direction of the planned object directly in the field.

The solution is particularly suitable for staking out building foundations, construction sites, pipelines, and other infrastructure.

Compact size – demanding performance

The i76 is designed to be easily portable. Its weight of only 450 grams and size of 106 × 55.6 mm make it an exceptionally compact GNSS receiver.

Despite its small size, the device is built for demanding field use. IP68 protection, 2-meter drop resistance, and an operating temperature of -40 °C to +65 °C make the i76 suitable for Finnish construction site and field conditions.

Versatile connectivity and RTK configurations

The i76 features Bluetooth, Wi-Fi, NFC, and a built-in 410–470 MHz UHF radio that supports both transmission and reception. This allows the i76 to be configured as both a base station and a rover.

The typical operating range of the UHF connection is about 3 km, and up to 5 km in optimal conditions, according to the manufacturer.

Suitable for diverse professional use

• land surveying
• construction measurements
• building foundation stakeout
• construction site measurement and positioning
• infrastructure construction
• pipeline and network measurement
• topographic mapping
• stockpile volume measurements
• CAD-based stakeout
• visual navigation and measurement

Technical specifications

• Full GNSS support
• 1892 GNSS channels
• 200 Hz IMU
• RTK accuracy up to 0.8 cm + 1 ppm (H)
• RTK accuracy up to 1.5 cm + 1 ppm (V)
• PPK accuracy 3 mm + 1 ppm (H) / 5 mm + 1 ppm (V)
• Two 2 MP cameras
• 95° camera field of view
• CAD + AR stakeout
• Visual navigation
• Tilt compensation 0–60°
• Bluetooth 5.4
• Wi-Fi 2.4 / 5 GHz
• NFC
• UHF radio 410–470 MHz
• 8 GB internal storage
• USB-C
• Weight 450 g
• RTK rover operating time up to 17 h
• Visual Stakeout operating time up to 10 h
• IP68 protection
• 2-meter drop resistance
• Operating temperature -40 °C – +65 °C

What does Mittatukku offer?

• Finnish language setup
• User training
• Technical support
• Measurement software setup
• Service and calibration services
• Financing and leasing solutions