
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 | 20-100 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 | 20-100 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
- 20-100 kHz
- output
- 4-20 mA, Modbus TCP
- power
- 24V DC or PoE
- protection
- IP65
Official supplier in Kazakhstan
Related products
Need advice?
Our specialists will help you choose the optimal Online4US - Compact Online Monitoring configuration for your equipment.
Related articles
All articles →
Vigilant continuous acoustic monitoring: from the SDT route to online
When a weekly SDT340 walkdown is no longer enough: how SDT Vigilant covers critical bearings, steam traps and inaccessible points 24/7 and plugs into the route-based programme.

Ultrasound at low speeds: how to diagnose a gearbox running at 0.1 rpm
Vibration analysis below 10 rpm often leads to wrong conclusions. A real case: a broken gear tooth at 2.95 rpm caught by the SDT340 where the vibration FFT could not help.

Steam Trap Inspection: How Failed Traps Burn Money
15–30% of steam traps are typically faulty. Ultrasound identifies blow-through, closed and healthy traps in seconds without shutting the line.

Partial Discharge in Switchgear and Substations: Hearing a Breakdown Before It Happens
Corona, tracking and partial discharge silently destroy switchgear, transformer and cable-joint insulation for months before a flashover. How ultrasound and UV inspection catch insulation defects from a safe distance.

Compressed Air Leaks: Money Going Out the Pipe
20–30% of compressor output is often lost to leaks. LEAKChecker on an SDT270 pays for itself in the first walkdown — before the energy bill proves it again.
Ultrasound Inspection Guide: A Beginner-Friendly Introduction
The fundamentals of ultrasound inspection for predictive maintenance — the 8 pillars of ultrasound testing, equipment options, methodology and a practical ROI breakdown.
