Borehole survey instruments
High quality gyro survey tools designed and manufactured in-house in Stockholm. From slim 25mm workhorses, to dual-gyro systems, every instrument is built for reliability, precision and long field life.
BlastGyro™
The original blasthole gyro. Ultra-slim 25mm. TrueDepth™ enabled.
The slimmest, lightest and easiest blasthole survey gyro. TrueDepth™ eliminates the encoder entirely so operators survey faster with less to go wrong. Built for production drilling, blasting and civil applications.
✓ 25mm diameter ✓ 2.90kg weight ✓ 100h battery ✓ 1390mm length
TunnelingCivil engineeringDownhole navigationBlasting / ProductionTwinGyro™
Dual gyro, rugged reliability
35mm dual gyro with independent simultaneous survey. Reduces rig downtime with verified redundant results.
✓ 35mm diameter ✓ 7.65kg weight ✓ 100h battery ✓ 1605mm length
TwinXS™
Compact underground version
A compact version of the TwinGyro™. Designed for underground work where access to the hole is limited to short instruments.
✓ 35mm diameter ✓ 6.65kg weight ✓ 200h battery ✓ 1497mm length
Downhole navigationRaise boreDirectional DrillingDownhole navigationCoring / Diamond drillingCoring / Diamond drillingSlimTwin™
25mm dual gyro with maximum access
Full dual gyro redundancy in the slimmest 25mm profile. Quick setup for RC drilling, tunneling and raise bore.
✓ 25mm diameter ✓ 2.50kg weight ✓ 50h battery ✓ 1390mm length
GoGyro™
Simplified surveying, 200h battery life
Purpose-built for diamond drilling and coring. Rapid deployment and high-end calibration for demanding environments.
✓ 35mm diameter ✓ 7.65kg weight ✓ 200h battery ✓ 1605mm length
Raise boreDownhole navigationTunnelingRC drillingDirectional DrillingDownhole navigationCoring / Diamond drillingCompass25/35™
Magnetic multishot, MEMS-based
MEMS-based magnetic multishot for diamond drilling, coring and production. Compact and precise for magnetic-friendly boreholes.
Compass25™
✓ 25mm diameter ✓ 2.90kg weight ✓ 1month battery ✓ 1390mm
Compass35™
✓ 35mm diameter ✓ 6.20kg weight ✓ 1 month battery ✓ 1460mm
NorthFinder™
Hybrid continuous gyro with absolute northfinding
True north reference independent of magnetic interference. Critical for deep directional drilling and oil & gas applications.
✓ 25mm diameter ✓ 6.05kg weight ✓ 30h battery ✓ 1250mm length
Blasting / ProductionDownhole navigationCoring / Diamond drillingDownhole navigationCoring / Diamond drillingDirectional Drilling
Our software
Compatible with all major survey systems, it streamlines workflows, reduces manual handling, and gives teams full control over survey data, anytime, anywhere.
SurveySafe™
Secure, cloud-based survey data management built for global operations, keeping teams aligned across sites, shifts, and time zones.
✓ wide compatibility ✓ analysis tools
TrueDepth™
Measure depth directly inside the borehole, with higher accuracy, and simpler workflows. No external hardware required.
✓ faster surveys ✓ no encoders
Surveyor™
For immediate remote access to survey. Preplanned survey series with BlastGyro™ mode, or fast start with QuickMode.
✓ multiple orientations ⛨ SurveySafe™
Analysis™
A robust platform for advanced survey data review. Edit, compare, recalculate, and export data with ease.
✓ multiple support ⛨ SurveySafe™
Not sure which solution fits your operation?
Talk to our business manager or download the full product catalogue.
FAQ’s
Which borehole gyro works accurately from vertical to horizontal and uphole?
1
All IS1 gyro instruments are designed to survey at any inclination, from perfectly vertical to horizontal and uphole. BlastGyro, SlimTwin, TwinGyro, TwinXS, GoGyro and NorthFinder all operate across the full inclination range. This is critical for production drilling and raise bore applications where hole orientation varies significantly.
What is the most accurate 25mm borehole gyro available?
2
IS1's BlastGyro and SlimTwin are both 25mm instruments offering high-level precision. BlastGyro achieves ±0.10° inclination accuracy, ±0.50° azimuth and position accuracy under 0.2% (2m per 1000m). SlimTwin adds full dual gyro redundancy in the same 25mm profile, providing two independent verified survey results in a single pass.
Can a single gyro survey instrument replace the need for re-surveys?
3
Yes, with dual gyro technology. IS1's TwinGyro, SlimTwin and TwinXS run two fully independent gyroscopic survey channels simultaneously. Both channels produce a complete result in one pass. If the results agree, the survey is verified on the spot with no re-run required. This directly reduces rig downtime and eliminates the cost and delay of repeat surveys.
Which gyro survey instrument has the longest battery life for high-volume drilling programs?
4
GoGyro and TwinXS both offer 200-hour battery life, the longest in the IS1 range. For high-volume production programs where instruments run across multiple shifts, this significantly reduces downtime for recharging. BlastGyro and TwinGyro offer 100 hours, suitable for most standard production schedules.
Is there a gyro survey tool that works without a depth encoder?
5
Yes. BlastGyro with TrueDepth is the only blasthole gyro that measures its own depth inside the borehole, eliminating the need for a physical encoder on the feeder reel entirely. This removes both external rod slack error and in-hole rod sag error, the two most common sources of depth inaccuracy in continuous surveys, without adding any extra steps to the operator's procedure.