Natural gas analyzer RA-915AM

airbenchtopcontinuous monitoring

About The RA-915AM monitors provide continuous mercury (Hg) measurements in ambient air, indoor air and natural gas. Designed for permanent unattended installation at air monitoring stations, the RA-915AM performs ultra-sensitive background Hg measurements and complies with EN 15852. The instrument operates fully automatically without monthly technician maintenance, requires no argon cylinders or consumables, and supports remote data transfer via RS-232/485, Modbus, analogue outputs and LAN.

Principle of operation Atomic absorption with Zeeman background correction.

Features and benefits

• Direct continuous measurements
• Low detection limits and wide measurement ranges
• High selectivity
• No chemicals, carrier or zero gases required
• Stable calibration with automatic zero and span correction
• Automatic recalculation to standard conditions
• Auto-control and preventive maintenance functions
• Low maintenance and no routine consumables
• Customizable operation parameters and communication protocols

Installation The RA-915AM is intended for indoor operation or mounting in climate-controlled cabinets and can be installed in a standard 19-inch rack. An embedded PC manages measurement control, data processing and transfer. Sampling can be expanded to multiple points (2–16) with an optional multiplexer. Remote interfaces include RS-232/485, USB, LAN and isolated 4–20 mA outputs.

Equipment and options

• RA-915AM air mercury monitor
• Optional flow switching device (multiplexer) for 2–16 sampling points

Warranty All Lumex equipment is covered by a 12-month warranty.

Technical specifications

• Measurement ranges (ng/m3): Range I: 0–2 000; Range II: 0–150 000; Range III: 0–3 000 000
• Limit of detection (ng/m3): Range I: 0.1; Range II: 10; Range III: 200
• Zero drift correction: Automatic
• Span correction: Automatic
• Air flow rate: 7–10 L/min
• Air temperature range: -20 to +40 °C
• Multiplexer sampling points: 2–16
• Sampling line length: up to 150 m
• Communication ports: RS-232/485; 2 x USB; LAN; Isolated 4–20 mA; Modbus (LAN or RS-485)
• Status outputs: MEASURING; ZERO CONTROL; CALIBRATION; SERVICE; FAILURE
• Power: 110/240 VAC, 50/60 Hz; max 120 VA
• Size (mm) — Analyzer: 665 x 482 x 222; Multiplexer: 665 x 482 x 222
• Weight (kg) — Analyzer: 25; Multiplexer (2–16 lines): 15–25