Oil Testing Instrument

LQHV-645 Oil Dissolved Gas Analyzer | DGA Chromatograph for Transformer Fault Detection

Industrial-grade LQHV-645 DGA analyzer detects transformer faults via gas chromatography. Features Ethernet connectivity, 4-detector capacity, and remote diagnostics.

US$1.00; Negotiated Price
Lead time: 30days

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Product Details

Product Tags

LQHV-645 Oil Dissolved Gas Chromatograph

Advanced dissolved gas analysis (DGA) system for predictive maintenance of power transformers and hydrogen-cooled generators

Product Parameter

Key Technical Indexes

Network anti-control system		Internal CAN's way, with interface board design, It can be converted to network port output at will
Signal output bits		24-bit
Communication interface		Network interface output(class 6 network cable connections)
Circuit design		ARM embedded design for easy wireless control, remote control and mobile app control
Temperature control system		Six-way independent temperature control
Temperature control		Room temperature - 450 ℃, liquid nitrogen refrigeration: - 80 ℃ - 450 ℃
Column box temperature control accuracy		±0.02℃
Program heating up		21 Stage 21 level, 0.1 ℃ / stage
Show module		Large-screen LCD
Display accuracy		0.01 ℃
Lift rate of column and box		0~80 ℃ / min (adjustment increment 0.1 ℃ / min) up to 120 ℃ / min
Temperature reprogrammed repeatability		≤1%
TCD detector sensitivity		S value ≥ 10000mv.ml/mg (benzene) )up to 12000 mv.ml/mg (benzene)
Baseline noise		≤10uv
Baseline Drift		≤50uv/30min
Detection limit of FID detector		≤5 x 10-12g/s(cetane)
Baseline noise		≤2 x 10-14A
Baseline Drift		≤1×10-13A/30min（After the instrument stabilizes for 2 hours）
Detection limit of ECD detector		≤1.0 x 10-13g/s （r-666）
Baseline noise		≤40uv
Baseline Drift		≤100uv/30min
Detection limit of FPD detector		≤1.4 x 10-12 g/s(p), ≤5×10-11g/s(S)
Baseline noise		≤20uv
Baseline Drift		≤50uv/30min
Extended		≤6 external events can be added
Automation engineering		Can be increased: automatic ignition function, automatic sampler connection, four-way flow pressure display function, optional counter-control workstation to achieve counter-control

Compliant with: IEC 60567 | ASTM D3612 | DL/T 722

Key Features

🔬 Multi-Detector Configuration – Supports simultaneous FID/TCD/ECD/FPD detection
🌐 Industrial IoT Ready – 10/100M Ethernet with Modbus/TCP integration
📊 Centralized Monitoring – Manages up to 253 chromatographs in one network
⚡ Precision Control – EPC/EFC with ±0.01psi pressure stability