Nova Analytical Systems
Canada
270 Sherman Avenue N.
Hamilton, ON L8L 6N5
Phone: (905) 545 2003• Fax: (905) 545 4248
Email: sales@nova-gas.com or websales@nova-gas.com United States
1925 Pine Avenue
Niagara Falls, NY 14301
Phone: (716) 285-0418 • Fax: (716) 282-2937
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The Nova 920 Series analyzers have been designed for monitoring recovered and processed gases from biogas installations. This equipment continuously removes moisture from the wet sample gas without the need for cooling water, compressed air, or failure-prone thermoelectric elements.

The 920 Series comes complete with pre-filter, sample pump, flow meter, continuous moisture removal system, long-life O2 sensor, infrared CO2/CH4 detector, low flow sensor, alarm relay contacts, and 4-20mA outputsmore
Unit of Measure

Specifications

Method of Detection

 O2 and H2S by electrochemical sensor, CH4 & CO2 by infrared detector

Ranges Available

 0-25.0% O2; any range between 0-50.0% to 0-100.0% CH4, CO2; 0-200 to 0-2,500 PPM H2S; 0-1000 BTU

Resolution

 0.1% on CO2, O2, & CH4, 1 PPM H2S, 1 BTU

Accuracy & Repeatability

 ±1% of full scale for O2 / CO2 / CH4

Drift

 Less than 2% of full scale per month

Response Time (T-90)

 Less than 30 seconds not including sample line delay

Ambient Temperature Range

 40 to 104°F (4 to 40°C). Optional: -20°C to 55°C (-4°F to 131°F) with Outdoor Pkgs.

Linearity

 ±1% of full scale for each gas measured

Size & Weight

 Approx. 24" H x 24" W x 10" D @ 90 lbs (61 x 61 x 25 cm @ 41 kg) Physical data may vary depending on options required

Power

 115 VAC 60 Hz (220 VAC 50 Hz available)

Output Options

 Isolated 4-20 mA standard RS232, RS485, MODBUS®, Ethernet outputs optional

Alarms

 Available: High O2, high CO2, low CH4, low flow; SPDT relays with 10A contacts

Analyzer Type

 Landfill Gas Analyzer

Primary Gas(es) to be Measured

 O2 / CO2 / CH4 / H2S

Hazardous Area Rating Options

 Class 1 Div 1 or Class 2 Div 2, using purge system General Purpose Non-Hazardous Areas

Applications

N/A For continuous analysis of oxygen (O2), methane (CH4), and/or carbon dioxide (CO2) in recovered gases from biogas applications. Hydrogen sulfide (H2S) readout optional.

Features

N/A

  • Temperature-controlled sensors for maximum stability
  • Long-life electrochemical O2 sensor
  • Infrared detector for reliable measurement of CH4 & CO2
  • Stainless steel hard tubing and corrosion-resistant components for internal sample path
  • Cabinet positive-pressure system to minimize the corrosive effects of hydrogen sulfide (H2S) on cabinet electronics & sensors
  • Built-in sample pump, pre-filter, filters, and flow meter
  • Automatic condensate removal
  • Rugged NEMA4 (IP65) enclosure
  • Isolated 4-20mA output for each gas
  • Low flow alarm & relay
  • Automatic calibration with touch screen LCD display
  • Diagnostic alarms with troubleshooting guidance
  • 'Cal-Now' button enables full calibration at any time by activating only one switch

Options

N/A

  • H2S & BTU readout (see ranges & models)
  • Gas hi/low alarms with relay contacts
  • Class 1 Division 2 rated purge kit for use in hazardous areas
  • Outdoor weather packages for operation from -20°C up to 55°C (-4°F to 131°F)

Calibration

N/A

  • Ambient air for O2 span and CO2 & CH4 zero
  • Analyzed calibration gas of CO2 and CH4 in nitrogen for CO2 & CH4 span and O2 zero