Picarro G2131-i 

Analyzer for δ¹³C in CO₂ with <0.1‰ precision. Simultaneously measures CO₂ and CH₄ concentrations with H₂O corrections. Designed for atmospheric and environmental research applications.

• Status: Active
• Country: USA
• Isotopic: Yes
• Type of measurable elements: Light stable isotopes (C, N, S, O, H)
• Measurable isotopes/elements: δ¹³C in CO₂
• Precision : δ¹³C in CO₂: <0.1‰ (>380 ppm CO₂); CO₂: ±200 ppb; CH₄: ±50 ppb; H₂O: ±100 ppm (30 s averages)
• Drift : <0.5‰ (24 hrs, 1 hr interval averages)
• Measurement range : CO₂: 380–2000 ppm (guaranteed); CH₄: 0–500 ppm (guaranteed); H₂O: 0–2.4% (guaranteed)
• Measurement rate : ~2 seconds (includes H₂O and CH₄ measurements)
• Probed volume: Gas sample chamber; typical flow rate: ~25 sccm at 760 Torr
• Throughput : Not applicable for discrete sampling
• Laser : Tunable diode laser
• Power Requirements and Consumption : 100–240 VAC, 47–63 Hz; <260 W start-up; 125 W steady-state (analyzer), 80 W (pump)
• Environmental requirements : Operating temperature: +10 to 35°C; Humidity: <99% RH non-condensing
• Dimensions and Weight: Analyzer: 43 cm W × 18 cm H × 45 cm D; Weight: 20.9 kg (analyzer), 6.5 kg (external pump)