Natural gas analyzer RA-915M / RP-91NG

airgasportable

Overview
The RA-915M analyzer with RP-91NG attachment is designed for direct determination of mercury concentration in hydrocarbon gases. Analysis is performed continuously in a gas flow without preliminary accumulation on a gold trap, providing reliable measurement across the full mercury concentration range in natural gas (from ng/m3 to mg/m3). The RA-915M can also be used independently for real-time mercury monitoring in ambient and indoor air. Additional Lumex Instruments attachments extend RA-915M functionality.

Principle of operation
Atomic absorption spectrometry at 254 nm with Zeeman correction for background absorption delivers highly selective and sensitive analysis without matrix effects. High selectivity and low detection limit permit direct real-time determination of mercury in a hydrocarbon gas flow without preconcentration on traps.

Features and benefits

• Direct continuous real-time measurements
• Low detection limit and high selectivity
• Wide dynamic measurement range (over 5 orders of magnitude)
• No sample pretreatment or reagents required
• No compressed gases necessary
• No pre-concentration on gold traps, eliminating memory effects
• Suitable for laboratory and field analysis of gas and air
• Low operating and maintenance costs

Applications
Designed for direct determination of mercury in natural gas sampled from wells, pipelines, cylinders or sample bags. Applicable where mercury in hydrocarbons causes technological or environmental issues (human exposure, equipment contamination, corrosion, catalyst poisoning). The portable RA-915M is also used for background air monitoring, mobile continuous surveys, indoor/outdoor pollution detection and mapping, demercurization control, occupational health and safety, and geochemical exploration.

Software
RAPID software provides intuitive instrument control, data acquisition and processing for RA-915M with the RP-91NG attachment.

Warranty
Covered by a full 1-year warranty.

Services
Installation and commissioning at customer site, technical support, operator training and custom application support are available on request.

Technical specifications

• Measurement principle: Atomic absorption spectrometry at 254 nm with Zeeman background correction
• Detection limit: 0.5 ng/m3
• Measurement range: 0 – 2000 μg/m3
• Sampling flow rate: 1 – 10 L/min
• Analysis time: Direct online
• Power supply: 100 – 240 VAC, 50 – 60 Hz
• Power consumption: 35 W (RA-915M analyzer); 35 W (RP-91NG attachment)
• Dimensions: 470 x 110 x 220 mm (RA-915M analyzer); 320 x 290 x 160 mm (RP-91NG attachment)
• Weight: 7 kg (RA-915M analyzer); 6.5 kg (RP-91NG attachment)