Asphalt Hydrogen Flame Ionization Detector

Model:LQJHFAD-1

I.Product Introduction

The LQJHFAD-1 portable flame ionization detector(FID)is a high-precision instrument designed specifically for the detection of volatile organic compounds(VOCs)and the analysis of the four components of asphalt.Employing hydrogen flame ionization technology,It features sub-second response,high sensitivity,wide linear range,and strong anti-interference capability,making it suitable for rapid laboratory and field testing.In particular,it meets the stringent requirements of the T0634—2025 Asphalt Four-Component Test(TLC/FID method)in the"Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering"(JTG 3410-2025)and ASTM D4124"Standard Test Method for Separation of Asphalt into Four Fractions(SARA)".

II.Detection Principle

This instrument is based on hydrogen flame ionization detection technology:hydrogen and air burn to form a high-temperature flame(approximately 2000℃).When organic compounds enter the flame,they undergo chemical ionization at high temperatures,generating ions(such as CH⁺)with a current several orders of magnitude higher than the baseline.These ions move directionally under the influence of a high-voltage electric field(typically+200~300V),forming a weak ion current.This ion current is converted into an electrical signal proportional to the concentration of the organic matter entering the flame by a high-impedance amplifier.Quantitative analysis is then achieved through data processing.

Core Features:Simple structure,high stability(small baseline drift),fast response speed(seconds),high accuracy(reading deviation≤±3%),and wide linear range(0~50000ppm).

III.Technical Specifications

Item:Parameter Values

Hydrogen Cylinder Capacity:100ml(built-in)

Maximum Working Pressure of Hydrogen:20MPa

Hydrogen Usage Time:≥12 hours when fully charged

Response time:≤3.5 seconds

Detection limit:0.5 ppm(typical organic compounds such as methane)

Measuring range:0~50000 ppm

Accuracy:±3%of reading

Protection Rating:IP65(Dustproof and waterproof,suitable for outdoor environments)

Explosion-proof Mark:Ex d ib mbⅡC T4 Gb(Composite explosion-proof)

Operating power:7.4V/0.6A(rechargeable lithium battery)

Battery life:≥8 hours(continuous operation)

Main unit weight:4.0kg(including battery and gas cylinder)

IV.Operating Conditions

Ambient Temperature:-10℃to+45℃(To prevent electrolyte freezing due to low temperatures or the stability of electronic components due to high temperatures)

Relative Humidity:≤85%(Non-condensing)

Power supply:7.4V/0.6A lithium battery(standard configuration),supports charging(charging voltage must match the instruction manual requirements).

Installation environment:Keep away from strong electromagnetic interference sources(such as high-power motors and radio frequency equipment),and avoid severe vibration.

V.Structural Composition

The main unit consists of the following parts(subject to the actual product):

Detector Body:Integrated hydrogen flame ionization chamber,ion collecting electrode,and high-voltage amplification circuit.

Gas System:Hydrogen cylinder(100ml/20MPa),air inlet(external compressed air or built-in air pump),and flow regulating valve.

Power Module:7.4V lithium battery and charging interface.

Control Panel:Display screen(showing flow rate,signal value,status),buttons(parameter setting,start/stop).

Explosion-proof Housing:Explosion-proof/intrinsically safe composite structure conforming to GB 3836 standard,protection level IP65.

Interfaces:Chromatography rod connection port,gas input/output port,power charging port.