
Supply in Kazakhstan
KEG TRK supplies ultrasonic diagnostics solutions (SDT Ultrasound Solutions) across Kazakhstan: Almaty, Astana, Karaganda, Ust-Kamenogorsk, Aktobe and other regions. Official warranty, monitoring system design, installation, commissioning and personnel training.
Mining equipment
Key features
Applications and resources
Industry solutions, landing pages and articles on Online4US - Compact Online Monitoring
Where it is used
Typical tasks
- Individual machines
- Pumping stations
- Compressor installations
- Fan systems
- Small production facilities
Overview
Online4US is a compact 4-channel online monitoring system for continuous ultrasound condition control of equipment. It's an ideal solution for individual machines or small production lines.
Features
Compactness
- 4 channels — optimal for most applications
- Small footprint — easy to install anywhere
- DIN rail mounting — standard mounting method
- Low cost — affordable solution
Connectivity
- Built-in web server — configuration through a browser
- Modbus TCP/IP — PLC integration
- 4-20 mA — analogue outputs
- Cloud connectivity — optional
Sensors
- SDT LUBEsense — for lubrication
- Contact sensors — for mechanical issues
- Airborne sensors — for leaks
- Universal — multi-purpose application
Applications
Individual machines
- Electric motors — large electric motors
- Pumps — critical pumps
- Compressors — air/gas compressors
- Fans — large fans
Small systems
- Pumping stations — 2-4 pumps
- Compressor rooms — 1-2 compressors
- Cooling tower fans — cooling towers
- Conveyor lines — head/tail drums
Advantages
Easy installation
- Plug and play — fast setup
- Web interface — intuitive
- DIN rail — standard mounting
- Compact — minimal space required
Cost savings
- Low cost — affordable price
- Fast payback — ROI
- Less downtime — prevention
- Maintenance optimisation — predictive
Monitoring
- 24/7 — continuous control
- Trends — historical data
- Alarms — early warning
- Integration — with existing systems
Technical specifications
| Parameter | Value |
|---|---|
| Channels | 4 fixed |
| Frequency range | 35–38 and 39–42 kHz (heterodyned to 0.5–3.5 kHz) |
| Analogue outputs | 4 x 4-20 mA |
| Digital protocol | Modbus TCP/IP |
| Web server | Built-in |
| Power | 24V DC / PoE |
| Enclosure | IP65 |
| Temperature | -20°C to +60°C |
| Dimensions | 150 x 100 x 50 mm |
Configurations
Bearing Monitoring
- LUBEsense sensors — fitted to bearings
- Friction levels
- Lubrication trends
- Early warning
Leak Detection
- Airborne sensors — for leaks
- Compressors
- Compressed-air systems
- Gas lines
Mechanical
- Contact sensors — mechanical defects
- Pumps
- Fans
- Other equipment
Web interface
Dashboard
- Real-time values
- Trends
- Alarms
- System status
Configuration
- Alarm thresholds
- Polling intervals
- Calibration
- Users
Integration
- Modbus mapping
- Analogue output configuration
- Cloud settings
- API access
Comparison
| Solution | Channels | Cost | Application |
|---|---|---|---|
| Online4US | 4 | $ | Individual machines |
| Vigilant | up to 16 | $$ | Lines, plants |
| SDT340 | Portable | $$$ | Technologist/expert |
Applications by industry
Water supply
- Pumping stations
- Treatment plants
- Water intakes
Manufacturing
- Critical lines
- Key equipment
- Batch processes
Power generation
- Boiler houses
- Small CHP plants
- Wind turbines
Oil and gas
- Pumping stations
- Compressor stations
- Booster stations
ROI and payback
Savings
- Failure prevention — one prevented failure pays for the system
- Maintenance optimisation — service only when needed
- Reduced downtime — fewer unplanned stoppages
- Equipment life — extended service life
Return on investment
- Payback in 6-18 months
- Depends on equipment criticality
- Downtime cost is factored in
Permanent Monitoring
Online4US is part of a series:
- Vigilant — scalable system
- Online4US — compact 4-channel unit
- LUBEsense — standalone sensors
Technical specifications
| Channels | 4 fixed channels |
| Frequency range | 35–38 and 39–42 kHz (heterodyned to 0.5–3.5 kHz) |
| Output | 4-20 mA, Modbus TCP |
| Power | 24V DC or PoE |
| Protection | IP65 |
| Temperature | -20°C to +60°C |
| Dimensions | 150 x 100 x 50 mm |
Applications
Manufacturer
SDT Ultrasound Solutions
Compact 4-channel online monitoring system for continuous condition control
Key specifications
- Channels
- 4 fixed channels
- Frequency range
- 35–38 and 39–42 kHz (heterodyned to 0.5–3.5 kHz)
- Output
- 4-20 mA, Modbus TCP
- Power
- 24V DC or PoE
- Protection
- IP65
Official supplier in Kazakhstan
Related products

Vigilant - Permanent Ultrasound Monitoring
A permanent ultrasound monitoring system for critical equipment, 24/7
- Up to 16 channels
- Ultrasound: heterodyne CONMONSense RSV sensors; vibration: sampling up to 51.2 kHz, up to 12,800 spectral lines

SDT340 - Advanced Ultrasound Detector
The most advanced ultrasound detector for collecting, analysing and trending data
- 20 kHz to 50 kHz
- 10 Hz to 10 kHz
Need advice?
Our specialists will help you choose the optimal Online4US - Compact Online Monitoring configuration for your equipment.
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