Part | Prototype AMS | Pre-industrial AMS |
Unit layout | Single box | Three modules: hardware, consumables, and battery |
Internal DNA control | N/A | Synthetic DNA in ethyleneiaminetetraacetic acid (EDTA) and ascorbate buffer |
Sample staining | 40 min at ambient temperature | 13 min at 60˚C |
Flow cell | Commercially available flow cell | Custom-built flow cell with minimal volume and large numerical aperture |
Measurement | Sample is static when illuminated | Sample flows slowly when illuminated to avoid bleaching of dye |
Dye dispensing | Fixed volume | Dedicated syringe pump for dye |
Lower limit of field detection | ~105 | Low limit of detection, LLOD |
− AMS 1: 1.9 × 104; AMS 2: 1.2 × 104 | ||
Low limit of quantification, LLOQ | ||
− AMS 1: 5.0 × 104; AMS 2: 3.2 × 104 | ||
Cleaning | NaOH | NaOH and oxalic acid |
Power | AC mains | Battery, charged either by AC mains or solar panels |
Remote communication | Team Viewer through Saudi Aramco intranet when AMS is on | Permanent RS-485 connection. Data retrieval and AMS control through dedicated software on remote computer |