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LoRaWAN® Super-Compact Bi-Axis Inclinometer | Alpha-INC SK 30B - Satevis-Systems

LoRaWAN Wireless Bi‑Axis Inclinometer

SATEVIS® ALPHA-INC SK 30°

Scalable Measuring Range ±30° and ±55°
Satevis® Alpha Inc SK 30B (SK: Super Kompakt) is a high-precision wireless bi-axis inclinometer sensor (scalable range ±30° / ±55°) that integrates the open-standard LoRaWAN® protocol, making it ideal for Structural Health Monitoring (SHM), geotechnical applications, land surveying, and smart infrastructure projects.
Designed for scalability and future-proofing, this evolutive device supports sensor fusion (Easy-Sense function), allowing seamless integration with external environmental sensors for expanded functionality.
The Satevis® Alpha Inc SK 30B offers easy integration with third-party cloud platforms (TTN, Chirpstack, Datacake…) or CommonSense®, our proprietary cloud software, ensuring flexible deployment and real-time data insights.
With its robust performance and adaptability, the Satevis® Alpha Inc SK 30B is the smart choice for precision monitoring in critical infrastructure applications.
Tri-Axis Range: ±10° / ±85° (scalable)
• Bi-Axis Range:
• ±30° / ±55° (scalable)
Wireless Protocol: LoRaWAN®, 868–923 MHz
• Wireless Protocol:
• LoRaWAN®, 868–923 MHz
Battery Life: Up to 7 years (ultra-low power)
 • Battery Life:
 • Up to 7 years
Enclosure: Rugged, waterproof aluminum
• Enclosure:
• Waterproof IP67
Datasheet
Quick Start
Drawing
Get a Quote
SATEVIS® ALPHA-INC SK 30° With 90° Bracket
SATEVIS® ALPHA-INC SK 30° With Magnetic Base
SATEVIS® ALPHA-INC SK 30° Standard-Version<br />SATEVIS® ALPHA-INC SK 30° With Alarm Output-Version
Technical Documents
Applications
Technical Specifications
Accessories
Video
FAQ
«Technical Specification Icon»

Technical Specifications

Key Features Product Ref Inclino.Sensor Temp.Sensor RF-LoRaWAN Config.Software DataLogger Available Functions Alarms Output Mechanical Power Supply Accessories External Sensors Uplinks/Downlinks Battery Life Simulation
Bi-Axis Inclinometer Sensors for an easy installation with scalable range ±30° / ±55°
Sensor Precision/Repeatability ( full scale, 25°C)
•±0.00183° for  ±30°  range
•±0.00366° for  ±55°  range
Open-standard LoraWan® Protocol with different Frequency Plan 868-923MHz
Ultra Long range : 8km-10km in L.O.S (Line of Sight) and 500m-1Km in NLOS (Urban environment)
Rugged & Waterproof Aluminum casing
Ultra-Low Power battery life up to 7 years
Built-in datalogger 380 000 Logs per channel
Flexible Cloud software Integration
PRODUCT REFERENCE
SAT-LORA-ALPHA-INC-SK-MR-AG-A0
MR– Measurement Range:

30° : Bi-axis ±30°/±55°

AG - Antenna Gain   

2dBi-868: 2dBi Antenna for  EU/IND Regions (Europe /India)
5dBi-868: 5dBi Antenna for  EU/IND Regions (Europe /India)
2dBi-915: 2dBi Antenna for  US/KR/AS/AU Regions (USA/KOREA/ASIA/AUSTRALIA)
5dBi-915: 5dBi Antenna for  US/KR/AS/AU Regions (USA/KOREA/ASIA/AUSTRALIA)
AO-  Alarm Output  

Dry Contact Alarm Output
Leave it empty if this option is not requested
Example 1: SAT-LORA-ALPHA-INC-SK-30B-2dBi-868,
Bi-axis Wireless Inclinometer ±30°/±55° with LoraWan connectivity,  2dBi Antenna 868Mhz

Example 2: SAT-LORA-ALPHA-INC-SK-30B-5dBi-915-AO,
Bi-axis Wireless Inclinometer ±30°/±55° with LoraWan connectivity, 5dBi Antenna 915MHz, Alarm Output
Inclinometer Sensor
Inclinometer technology
MEMS Technology
Scalable Measuring Range
User-selectable static range ±30° or ±55°, or automatic range (the range switches automatically between ±30° and ±85° at runtime based on measured tilt)
Sensor resolution
0.00183° for  ±30°  range
0.00366° for  ±55°  range
Noise density
0.0009 °/√Hz
Sensor Precision/Repeatability ( full scale, 25°C)
±0.00183° for  ±30°  range
±0.00366° for  ±55°  range
Sensor Accuracy (full scale, @ 25°C )
±0.005° for ±30°  range (±30° range selected)
±0.01° for ±45° range (±55° range selected)
±0.02° outside ±45° range (±55° range selected)
Offset temperature dependency (temperature range –25°C to +85°C)
±0.002°/°C
Offset LifeTime Drift (@25°C)
±0.05 °
Sensor frequency Response (-3 dB)
DC to 10 Hz for  ±30° measurement range
DC to 40 Hz for  ±55° measurement range
Calibration
Factory calibrated at 9 reference points: 0° absolute, ±5°, ±10°, ±30° and ±45°, with calibration settings stored in the sensor Flash memory.
Calibration method: back-to-back calibration against a high-accuracy reference sensor.
Calibration values and date of calibration are available via Satevis Link.
Optional: certificate of calibration (Ref: CERT-SATEVIS-INCLINOMETER).
Sensor Zeroing function
Sensor zeroing can be performed after installation. Hold the supplied magnet against the "Sensor Zeroing" label for approximately 10 s; the zero-offset is then applied to the X, Y and Z axes. It can also be performed remotely via a downlink.
Integrated Temperature sensor
Inclinometer compensation sensor
Integrated in the inclinometer die. Resolution: 0.06 °C. Accuracy: ±1 °C over −40 °C to +80 °C.
Temperature sensor used to monitor battery
Mounted under the cell. Resolution: 0.05 °C. Accuracy: ±1 °C over −40 °C to +80 °C.
RF Specifications
LoRaWAN® Stack
LORAWAN V1.0.2 REVB CLASS A
Activation Mode
OTAA only
LoRaWAN® Frequency Plan
Frequency Plan can be configured with Satevis Link software ( USB Connection):
✓ Europe 868MHz
✓ USA: 915MHz
✓ Australia 915MHz
✓ Asia 923MHZ
✓ Korea 920MHz
✓ India 865Mhz

Important : the device is supplied with the antenna matching the destination region — 868 MHz variant (Europe, India) or 915 MHz variant (USA, Korea, Asia, Australia).
TX Power
Low TX Power Radio: 14dBm @868/915MHz
Receiver Sensitivity
-136.5dBm sensitivity for SF12 with 125KHz BW
Link Budget
155 dB with High Gain Antenna
153 dB with Low Profile Antenna
Maximum Radio Range
✓ 8-10 Km in L.O.S. / Rural Environment
✓ 500m to 1km in NLOS/ Urban Environment
Test conditions: 5dBi antenna used on sensors, Gateway Installed on a mast  10 meters Height, with 8dBi High Gain Antenna. Sensor installed on 1-2 meters Height, SF12
Antenna
Waterproof N-Type Omni Antenna,
Gain 5 dBi or 2dBi / VSWR  ≤   2.0
Frequency range for AG-2dBi-868  and   AG-5dBi-868 : 863-870 MHz
Frequency range for AG-2dBi-915  and   AG-5dBi-915 : 902-928 MHz
Dimensions ⌀22 x 64 mm for 2dBi
Dimensions ⌀22 x 180 mm for 5dBi
Configuration Tools (from USB)
Satevis Link software (free)
Configure : frequency plan, AppEUI, AppKey
Download: Factory calibration data
Tera Term (free , open-source)
Firmware upgrade: free during the product lifetime
Download Datalogger: using fast YModem method
Batch configuration : Excel template → CSV → upload. All monitoring-mode timing parameters, per-channel alarm thresholds, LoRaWAN settings (frequency plan, AppEUI, AppKey). Designed for fast multi-device deployment.
DataLogger/Recorder
Datalogger Size
If 3 sensors Channels ( Bi-Axis Inclinometer, 1 Internal Temperature) :
380 000 Log sessions per sensor channel
If 5 sensors Channels ( Example: Tri-Axis Inclinometer, 1 Internal Temperature, External Temperature, External Humidity) :
279 000 Log sessions per sensor channel
Logged Information
UTC Clock
Data Measurement
Monitoring Mode
Remote configuration from LNS
DataLogger Start/Stop/Erase
Download Method
From USB with Tera Term Terminal Software, CSV format
Available functions
ON/OFF
Operated from a magnet
Hello
Transmits Data and Sensor Quick Diag on user request , works with a magnet pointing to Hello label
Sensor Zeroing
Sensor zeroing on user request , works with a magnet pointing to sensor zeroing label. Operated from a magnet.
Multi color LED
Green: Power ON
Blue: Sensor zeroing successful/Hello Message Transmitted successfully
Red: Fault or Switching off
Alarms Output (Optionnal)
Dry Contacts
3 x Dry contacts Output to trigger external Alarm system : Minor Alarm, Severe Alarm , Critical Alarm
Connector Type
M8-5 Pins  Male socket
Environmental and Mechanical
Casing
Aluminum Waterproof casing  (see IP rating below for sealing conditions)
Dimensions in mm (LxWxH):  111x51x64 mm (without antenna)
Weight : 350g (with 5dbi Antenna and cell)
IP | NEMA Rating
IP67 / NEMA 6 as supplied  
IP68 when M8 connector cap is fitted, connector shield (REF: SATEVIS-SK-SHIELD) is used and antenna connector is sealed with self-fusing tape (see user guide)
Shock resistance
100 g, 50 ms half-sine (per IEC 60068-2-27)
Operating Temperature
-40°C to +80°C
A sunshield is recommended where prolonged solar exposure may raise the enclosure temperature above +60 °C, to avoid measurement drift and reduced battery life (check Ref: SATEVIS-SK-SHIELD).
Mounting base
Screw Mounting
Relative   Humidity
0 to 98 %RH, non-condensing
Norms & Radio certifications
·  CE marking per Directive 2014/53/EU (RED)
·  EN 300 220-1 / -2
·   EN 301 489-1, EN 301 489-3 (SRD)
·   EN 62368-1:2014+A11:2017 (safety)
·  FCC Part 15.247 (USA)
·  ISED RSS-247 (Canada)
·  ARIB STD-T66 Ver 3.6
-HS Code: 9031.80.20
-EAR99
-RoHS 3 (2015/863); REACH SVHC
Power supply
Integrated D-Size Primary Cell
Non-Rechargeable , standard and swappable  Lithium Thionyl Chloride
D Size . Capacity 19Ah (@4mA) , Nominal Voltage 3.6 Volts
Ex: EVE ER34615
Current consumption @ 3,3V
· During data acquisition : 8-10 mA
· During Radio transmission : 19 mA @ +14 dBm
· During Battery Saver Mode : < 9 µA
External power supply
USB Power 5VDC. When the device is powered from USB, the internal battery pack is disconnected from the power path.
Included accessories
1x Lithium Primary Cell - D Size Cell 19Ah with battery remover strap
1x Magnet for Sensor-Zeroing  & Hello functions
2x M8 Cap for USB  & Easy-Sense sockets
1 x USB to M8  cable adapter, 2 meters length
1 x Self-fusing tape (25cm length)
1 x LoraWan Antenna ( see antenna options on reference builder)
Optional Accessories and Services
Magnetic Mounting
Magnetic Mounting Kit Ref: SAT-MAG-SK-MNT
90° Bracket Mounting
90° Bracket mounting (with integrated eyelet) with 4 x M5 screws + Locknut
Material : Aluminum AL6061, Black Anodized
Ref: SAT-BRACK-SK-MNT
Connector Shield
Connector & Sun shield, 3D-printed glass-fibre-reinforced ASA with High-UV Stability, Max Heat deflection temperature 105°C
REF: SATEVIS-SK-SHIELD
Calibration certificate
Calibration certificate provided by Beanair Sensors
A static calibration method is used on a granite surface plate DIN876
Ref: CERT-SATEVIS-INCLINOMETER
Optional External Sensors (Easy-Sense)
Temperature and HumIdity sensor
EASY-SENSE-TH-CL-XX
Displacement Sensor (Spring Return or Ball Joint)
SAT-EASY-SENSE-DISP-SR-XX , SAT-EASY-SENSE-DISP-BJ-XX
Available Uplinks/Downlinks
Javascript formatter code
Free JavaScript formatter code to accelerate the integration of Satevis sensors with  your LNS (LoRaWAN Network Server) :
- Downlink formatter code (Alarm Threshold, Monitoring mode….)
- Uplink formatter code(Data measurement)
Monitoring mode
Different measurement modes are available:
Slow measurrement (battery saving), Measurement heartbeat 30s to 24 hours
Alarm measurement mode, Measurement heartbeat 30s to 24 hours
Alarm Thresholds
Alarm Threshold configurable for each sensor channel, Three levels of Alarm Threshold  Minor Alarm / Severe Alarm / Critical Alarm
Scalable Mesurement Range
±30°, ±55°
Battery Diagnostic Report
Battery Voltage & Temperature, Power Source USB/Battery, Datalogger Status, Data Loss during Transmission, Battery advanced Diag Overvoltage/UnderVoltage
Battery Life with for different Refresh cycle @25degC and LoraWan Modem configured with SF7 airtime
Refresh Cycle every 1 minute
5.5 years
Refresh Cycle every 5 minutes , 1Hour, 4 hours
10 years ; limited by shelf-life
For more information about battery life at different temperature , use the battery simulation file:
https://www.satevis-systems.com/battery-life-simulation.html
«Applications Icon »

Applications

Antenna Base Station Construction Site Bridge Monitoring Tunnel Monitoring Cargo Ship Monitoring Aircraft Monitoring






«Video Icon »

Video

«Sensors Fusion Icon»

Ready for Sensors Fusion thanks to Easy-Sense Function

Our hardware features seamless integration with external sensors through the Easy-Sense function, empowering users to connect sensor networks directly to their own AI models.

Key sensor information delivered by Easy-Sense

The Easy-Sense function delivers key sensor information, including:
• Sensor type
• Calibration settings and calibration date
• Alarm threshold values (three levels: Critical, Severe, Minor)
• Sensor zero-offset and zero-offset date (if available)

This comprehensive integration enables precise prediction of potential damage, malfunctions, or failures in structures and equipment.

Discover our new Sensors with Easy-Sense function:
• Easy-Sense | Displacement Sensors
• Easy-Sense | Temp. and Humidity Sensors


«Alarm Criteria Icon»

Define Your Own Alarm Criteria

• Customizable Alarm Thresholds:
Set independent alarm thresholds for each measurement channel, with flexible AND/OR logic for complex triggering.
• Three Alarm Levels:
Define Critical (Highest), Severe, and Minor alarm levels to prioritize notifications and automate actions—such as email/SMS alerts or relay activation—based on alarm severity.
«Define Your Own Alarm Criteria»
 Satevis® Alpha-INC SK features an optional dry-contact alarm output for easy integration with external alarm systems
Satevis® Alpha-INC SK features an optional dry-contact alarm output for easy integration with external alarm systems, Programmatic Logic Controllers (PLCs), or Building Management Systems (BMS). The dry-contact output supports three configurable alarm levels—Minor, Severe, and Critical—based on user-defined sensor thresholds. This enables real-time monitoring and automated responses, improving operational efficiency while minimizing downtime.
«Cloud Software Icon»

Seamless Integration with a 3rd Party Cloud software

Seamless Integration with a 3rd Party Cloud software
Key Integration Features

Satevis® Alpha-INC SK Wireless Inclinometer ensures effortless connectivity with third-party IoT platforms. Engineered for interoperability, it features fully documented uplink and downlink communication, allowing for real-time monitoring and remote device configuration (zeroing, alarms, and updates) without on-site intervention. Make deployment faster with our ready-to-use JavaScript payload decoders, compatible with major network servers like The Things Network (TTN) and Chirpstack.
«Sensor Zeroing Icon»

Instant Sensor Verification with ‘Hello!’ function

  • “Hello!” function helps the field operator to check the sensor installation & configuration
Caption1:
Caption1:
After installing the Satevis®sensor inclinometer, the field operator can check at any moment if the sensor is working properly
View
Caption2:
Caption2:
By Holding the magnet on the ‘Hello!’ label for more than 10s, the sensor wakes-up and transmits to the Lorawan network the data measurement followed by the system diagnostic ( battery status and network quality)
View
Caption3:
Caption3:
The Activity Led blinks in green color, confirming that a data measurement is transmitted to the Lorawan network.
View
Caption 4:
Caption 4:
The field operator can check on Satevis® Cloud software (or a third-party cloud software) if his sensor is working properly.
View
Caption 5:
Caption 5:
When your Satevis® Sensor , is integrated with external alarm systems, the Hello function lets you test the connection by sending a short pulse to the alarm output ensuring proper functionality without triggering an actual alarm.
View
Caption 6:
Caption 6:
When your Satevis® Sensor , is integrated with external alarm systems, the Hello function lets you test the connection by sending a short pulse to the alarm output ensuring proper functionality without triggering an actual alarm.
View
«Sensor Zeroing Icon»

Effortless Sensor Installation with Automatic Zeroing

  • Sensor zeroing function simplifies the sensor installation
Caption1:
Caption1:
Even if an angle bracket is used, it’s sometimes difficult to bring a zero-offset on both X and Y axis.. In some cases, the field operator can not spend too much time on this task.
View
Caption2:
Caption2:
To enable the sensor zeroing function, hold the magnet on ‘Sensor Zeroing” Label for more than 10s.
View
Caption3:
Caption3:
The Activity LED blinks in blue, the sensor zeroing starts on both X and Y axis . When this process is done, the Activity led will blink again in blue color and transmits a data measurement to the Lorawan® network.
View
Caption 4:
Caption 4:
The Sensor-zeroing process can be also done remotely from the cloud software.
View
«Anti-Aliasing Filter Icon »

Accessories

INCLUDED ACCESSORIES

1x Lithium Primary Cell - D Size Cell 19Ah with battery remover strap

1x Magnet for Sensor-Zeroing & Hello functions

2x M8 Cap for Power Supply & external optional sensor

1 x USB to M8 cable adapter, 2 meters length

1 x Self-amalgamating tape (25cm length)

1 x LoRaWAN® Antenna ( see antenna options on reference builder)
OPTIONAL ACCESSORIES AND SERVICES

90° Bracket Mounting
90° Bracket mounting (with integrated eyelet) with 4 x M5 screws + Locknut
Material : Aluminum AL6061, Black Anodized
Ref: SAT-BRACK-SK-MNT

Magnetic Mounting
Magnetic Mounting Kit Ref: SAT-MAG-SK-MNT

Connector Shield
Connector & Sun shield, 3D-printed glass-fibre-reinforced ASA with High-UV Stability, Max Heat deflection temperature 105°C - REF: SATEVIS-SK-SHIELD

Calibration certificate
Calibration certificate provided by Beanair Sensors
A static calibration method is used on a granite surface plate DIN876
Ref: CERT-SATEVIS-INCLINOMETER
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Download Resources

Step File
Drawing
Technical Note
Battery life simulation
Datasheet
Selection Guide
Quick Start
User GUIDE
Certificate of Conformity EU Satevis sensor series
Satevis® Link Software

Technical & Product FAQ

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Support

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2 YEAR LIMITED WARRANTY
We’re confident of the quality of our products and we’ll repair, without charge, any defects due to faulty materials or workmanship within the specified warranty.
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