900B垃圾填埋场和沼气回收处理分析仪
900B垃圾填埋场和沼气回收处理分析仪的设计回收和处理的监测，从垃圾填埋气和沼气的网站。此设备不断删除而不需要冷却水，压缩空气，或失败，容易热电元素从湿样气水分。900系列带有预过滤器，采样泵，流量计，压缩式除湿系统，硫化氢过滤器，四氟液块，长寿命的氧传感器齐全，红外探测器CO2/CH4的，低流量传感器，报警继电器触点，并为每个气4 - 20mA输出测量。
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The Nova 900 Series analyzers have been designed for monitoring recovered and processed gases from landfill and biogas sites. This equipment continuously removes moisture from the wet sample gas without the need for cooling water, compressed air, or failure-prone thermoelectric elements. The 900 Series comes complete with pre-filter, sample pump, flow meter, compression-style moisture removal system, H2S filter, PTFE liquid block, long-life O2 sensor, infrared CO2/CH4 detector, low flow sensor, alarm relay contacts, and 4-20mA outputs for each gas measured. The sensors are mounted in a temperature controlled heated box to reduce drift due to ambient temperature swings.
On the B ('Cal Now') and C (Full Autocalibration) models, all calibration functions are controlled through the display rather than manual potentiometers. The C model includes additional helpful information for effective analyzer preventative maintenance. The C model has timed alerts that will appear on the display when a filter is ready to be changed. The alert can either be 'Accepted' if the filter is changed, or 'Acknowledged' if there is no immediate need. Regular maintenance of filters are critical to the long term reliability of the analyzer. Diagnostics and troubleshooting information are also included in the display interface of the B and C models. This assists operators to quickly determine the cause of an alarm and get the analyzer back on-line. Spare part numbers relevant to the alarm are included in the display.
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Method of Detection
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Long life electrochemical O2 sensor, field-cleanable infrared CH4 & CO2 detector
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Ranges Available
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0-25.0% O2; any range between 0-50.0% and 0-100.0% CH4, CO2
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Resolution
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0.1% on CO2, O2, & CH4
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Accuracy & Repeatability
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±1% of full scale
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Drift
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Less than 2% of full scale per month
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Response Time (T-90)
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Less than 30 seconds not including sample line delay
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Ambient Temperature Range
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40 to 120°F (4 to 48°C), Lower temperatures (-5°F, -20°C) with Cold Weather Package
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Linearity
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±1% of full scale for each gas measured
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Size & Weight
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24" H x 20" W x 10" D @ 90 lbs (61 x 51 x 25 cm @ 20 kg)
Physical data may vary depending on options required
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Power
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115 VAC, 60 Hz
220 VAC, 50 Hz
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Output Options
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4-20 mA into 500 ohms non-isolated standard
Isolated 4-20 mA, RS232, RS485, MODBUS, Ethernet outputs
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Alarms
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High O2, high CO2, low CH4, low flow; SPDT relays with 10A contacts
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Analyzer Type
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Landfill Gas Analyzer
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Other Analysis Options
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BTU - BTU readout, range 0-1000 BTU
H1 - H2S, range 0 - 200 PPM
H2 - H2S, range 200 - 5000 PPM
H3 - H2S, range 1000 - 10000 PPM (if no CO2 in sample)
H4 - H2S, range 1000 - 10000 PPM (if CO2 is in sample)
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Hazardous Area Rating Options
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General Purpose, Non-Hazardous
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For continuous analysis of oxygen (O2), methane (CH4), and/or carbon dioxide (CO2) in recovered gases from landfill and biogas sites.
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- Easy to use manual potentiometer calibration with LCD digital displays for each gas
- Temperature controlled sensors to reduce drift due to ambient temperature swings
- Long life electrochemical O2 sensor
- Modular, field-cleanable infrared CO2/CH4 detector
- Cabinet positive-pressure kit to minimize corrosive effects of hydrogen sulfide (H2S) on cabinet electronics & sensors
- Built in sample pump, pre-filter, filters, and flow meter
- Automatic moisture removal without the use of cooling water, compressed air or failure-prone thermal-electric elements
- Vacuum gauge and valve to allow user to measure and minimize vacuum effects if unit is vented back to blower
- Rugged NEMA4 (IP65) enclosure
- 4 - 20 mA outputs for each gas
- Low flow alarm & relays
- Microprocessor control and LCD touch screen display
- Graphing view shows approx. 12 hours of historical data
- Display includes access to alarms, basic troubleshooting guides, and sensor diagnostic information.
- Magnetic 'cal now' button allows 'one touch' calibration without the need to open the enclosure door
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- Gas hi/low alarms with relay contacts
- Isolated analog, RS232, RS485, MODBUS, and Ethernet outputs available
- Class 1 Division 2 Group BCD rated purge kit for use in hazardous areas
- Cold weather package for operation to -20°C (-5°F)
- Solid-state cabinet coolers that do not require instrument air
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- Ambient air for O2 span and CO2 & CH4 zero
- Analyzed calibration gas of CH4 in nitrogen with a representative balance of CO2 and N2 for CO2 & CH4 span and O2 zero
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