The Teledyne N701H ZAG available from CleanAir is a self-contained source of high-purity zero air for dilution calibrators. It is designed for sensitive analyzers in ambient background and trace-level applications, and removes target contaminants to levels below the detection limits of trace-level gas analyzers. No supplied air is needed.

An oil-less, diaphragm-free pump supplies air to scrubbers that remove SO2, NO, NO2, O3, H2S and NH3. A heated converter removes carbon monoxide (CO) and hydrocarbons. A regenerative, heatless dryer produces a dew point below -40 °C at up to 30 SLPM at 30 psig (at sea level). The unit continuously monitors pressure, temperature and dew point, and a microcontroller adjusts pump cycling, valve timing and heater power to match.

Through Modbus over Ethernet (TCP/IP) or RS232, users can monitor dew point status, scrubber temperature, box temperature and output pressure. The internal pump can be turned off remotely to lengthen service intervals and lower power use, and warmup can be started before arriving on site. CleanAir provides Modbus and IP address setup guidance for this unit.

Features

• Long-life scrubbers
• Regenerative, heatless dryer
• High-performance CO/hydrocarbon scrubber
• Trace-level output purity
• Dew point indicator
• Modbus connectivity (standard)
• Automatic pump control and water drain

Specifications

• Maximum output: 30 SLPM at 30 psig; 10 SLPM at 60 psig
• Dew point: less than -40 °C
• Dryer: regenerative, heatless; lifetime greater than 5 years
• Output concentration: SO2, H2S, NO, NO2 and NH3 < 0.025 ppb each; O3 < 0.3 ppb; CO < 10 ppb; hydrocarbons < 0.25 ppb
• Compressor: dual-cylinder, internal, long-life, oil-less piston pump
• Power: 110–120 V, 60 Hz; 220–240 V, 50/60 Hz
• I/O: 1 x Ethernet 10/100Base-T; 1 x RS232 (57,600 baud); Modbus protocol
• Operating temperature: 5–40 °C
• Dimensions (H x W x D): 8.75 x 17 x 28 in (222 x 432 x 711.2 mm)
• Weight: 69 lb (31.3 kg)