Eyes for Exploring the Unknown World

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The Charged Aerosol Detector (CAD) is a universal detector with high sensitivity, high reproducibility, and a wide linear range for non-volatile and semi-volatile compounds.

CADetector a1 Charged Aerosol Detector

Intuitive Touch Display

CADetector a1 front touch display

Patented Technology

Fine atomization of the mobile phase

Precise aerosol flow splitting

CADetector a1 Patented Technology

Charged Aerosol Detection Principle

CADetector a1 Charged Aerosol Detection Principle

Atomization

A two-phase coaxial nebulizer uses a high-speed gas flowto impact the mobile phase, with an average particle size of ≤10 µm.

CADetector a1 Atomization

Evaporation

A stainless-steel evaporation tube and high-precision temperature sensorprovide temperature-control accuracy of ±0.01 °C.

CADetector a1 Evaporation

Charging

A tungsten-alloy corona needle and high-voltage corona technologyprovide corona-current accuracy of ±0.1 nA.

CADetector a1 Charging

Detection

A Faraday cup with gas filtration captures charged particleswith charge-collection accuracy of ±0.5 fA.

CADetector a1 Detection
CADetector a1 High Sensitivity

High Sensitivity

Excellent response for compounds down to the pg level.

CADetector a1 High Reproducibility

High Reproducibility

Repeatability below 2% RSD supports reliable and accurate results.

CADetector a1 Wide Linear Range

Wide Linear Range

A linear range spanning four orders of magnitude.

CADetector a1 Broad Applicability

Broad Applicability

Suitable for non-volatile and semi-volatile compounds.

CADetector a1 Mass Response Consistency

Mass Response Consistency

Mass-sensitive detection more closely reflects the actual analyte mass.

Advantages of CAD Compared with Other LC Detectors

Detector typeCADELSDUVDRIDMS
Sensitivity✅✅✅
Gradient compatibility✅✅✅✅
Baseline stability✅✅✅
Solvent influence✅✅✅
Mass response consistency✅✅✅

Pharmaceutical Industry

Supports drug discovery, development, pharmacokinetic studies, clinical trials, and pharmaceutical QA/QC.

Petrochemical Industry

Supports separation and analysis of raw materials and products in petrochemical production.

Food Safety

Addresses increasing quality and safety requirements in food analysis.

Semiconductor Industry

Supports analytical needs arising from semiconductor research and manufacturing.

Environmental Monitoring

Supports pollution monitoring, source tracing, treatment, and control.

New Energy Industry

Supports qualitative analysis of unknown organic compounds in battery material development.

CADetector α1 Specifications

㊟ Instrumax-specific performance indicators

Detection principleCharged aerosol detectionGas inlet pressure482–551 kPa (4.8–5.5 bar; 70–80 psi)
NebulizerTwo-phase coaxialDigital interfacesLAN, RS232 ㊟
Noise≤0.1 mV under typical water/methanol conditionsAnalog signal range−0.5 V to 2.5 V
Drift≤0.2 mV/60 min under typical water/methanol conditionsControl signalsStart, stop, auto-zero inputs; alarm output ㊟
Calibration relationshipCorrelation coefficient >0.99 for caffeine calibrationWetted materialsSS316L, PTFE
Repeatability≤2 % RSD for caffeine test solutionProtection functionsVapor, gas pressure, gas flow, leakage, temperature and voltage monitoring ㊟
Signal-to-noise ratio≥10 for caffeine test solutionDisplay8.8-inch RGB display, 1280 × 480
Corona-current setting range0.5–1.5 µA ㊟TouchscreenCorrosion-resistant capacitive glass touchscreen ㊟
Liquid inlet flow0.01–2.0 mL/min ㊟Screen lock0–10 minutes ㊟
Drift-tube temperatureRoom temperature +5 °C to 110 °C ㊟Power supply100–240 VAC, 50–60 Hz, 150 W