The Model N901 is a near-continuous hydrocarbon gas analyzer that measures the concentration of Methane (CH4) and Total Hydrocarbons (THC) in air. The concentration of the non-Methane (NMHC) component is calculated by the subtraction of CH4 from THC, with high sensitivity and accuracy. The hydrocarbons are measured using a Flame Ionization Detector (FID), in combination with gas chromatography (GC). The instruments range and performance are tuned specifically for use in ambient air quality monitoring assessments.
The Model N901 is designed for simple operation and maintenance with a modular hardware and electronics architecture. A long-life stainless-steel fritted filter is used at the sample intake to effectively remove particulate matter without introducing any gas-phase measurement artifacts. Instrument operation, calibration functions, chromatogram views, and data handling are all automated and controlled using the internal NumaView™ Software (NVS) interface, without the need for an external PC.
For remote connection to the N901 instrument, Teledyne API’s NumaView™ Remote PC-based Software provides a virtual interface, instrument controls, and data downloading capability to all TAPI analyzers operating NumaView™ Software.
Features
- 60s default cycle time
- 25 ppb LDL (CH4, NMHC)
- Fully programmable and automated directly from the instrument front panel interface
- Modular internal hardware design for ease of maintenance
- All internal components operate on 24VDC
- Front panel USB connections for peripheral devices and firmware upgrades
- Real-time chromatogram display during calibration routine
- Real-time graphical displays of concentrations and diagnostic parameters
- Comprehensive internal datalogging with programmable averaging periods
- Ethernet and Serial outputs, standard
- Analog output and digital I/O expansion (options)
- Internal pressurized span valve for auto calibration (option)
| Detector | Flame Ionization Detector (FID) |
| Method | Gas Chromatography with CH4 separation column |
| Ranges (Methane) | Min: 0-5 ppm Max: 0-1,000 ppm |
| Lower Detectable Limit | <25 ppb (Methane); <25 ppb (Propane) |
| Cycle Time | 60 sec (minimum), user-definable |
| Precision | <1% of reading or 0.05 ppm (whichever is greater) |
| Linearity | <1% of full scale |
| Zero Drift | Zero baseline performed once per cycle |
| Span Drift (24hr) | <1% of full scale |
| Sample Flow Rate | 60 cc/min + 10% |
| Carrier Gas | 50 to 70 psi, N2 UHP Grade, Consumption 20 cc/min |
| Fuel Gas | 50 psi ± 5%, H2 UHP Grade, Consumption 35 cc/min |
| FID Air | 50 psi ± 5%, HC Free clean air, Consumption 350 cc/min |
| Auxiliary Air | 70 psi ± 5%, Clean Dry Air, Consumption 1 cc/actuation |
| Included I/O | 1 x Ethernet (TCP/IP) 1 x RS232 2 x front panel USB device ports |
| Optional I/O | Universal Analog Output Board includes (all user-definable): 4 x Isolated Voltage Outputs (5V, 10V; user-selectable) 3 x Individually Isolated Current Outputs (4-20mA) Digital I/O Expansion Board includes: 3 x Isolated Digital Input Controls 5 x Isolated Digital Output Controls (user-definable) 3 x Form C Relay Alarm Outputs (user-definable) |
| Dimensions (HxWxD) | 7” x 17” x 23.5” (178 x 432 x 597 mm) |
| Weight | 35 lbs (16 kg) |
| Operating Temperature | 75-40°C |
| Power | 100-240V, 50/60Hz, Typical Power 130W |
| Warranty | Two years |
