|Options and Accessories|
Backup Pump with Flow Meter (Upgrade for Older Instruments)
The air pumps used in our Model 202 and 205 Ozone Monitors have a rated lifetime of approximately 5,000 hours (~7 months) of continuous operation, but this can vary (~3,000 - 8,000 hours) depending on inlet restriction and environmental conditions. New Model 202 and 205 Ozone Monitors now include a flow meter and backup pump. The air flow rate is continuously measured, logged (if logging is chosen) and output over the serial port along with the other data (ozone, internal temperature, internal pressure, 3 analog inputs, date and time). When the flow rate drops below a critical level, the microprocessor shuts off the main air pump and turns on the backup pump. An asterisk (*) appears on the display to indicate that a pump needs to be replaced. This feature provides assurance that the flow rate through the instrument is sufficient to provide accurate measurements and greatly reduces the risk of data loss due to a pump failure. A backup pump upgrade is now available for older instruments (serial numbers <575) for $500, which includes two new air pumps. For instruments with serial numbers <300, the flow meter is not installed; instead the backup pump is activated based on a differential pressure measurement.
External Long-Life Pump
A larger, external pump is offered for those applications where long pump life is desired and power consumption is not critical. The external air pump has a rated lifetime of 15,000 hours (1.7 years) of operation. It draws 0.26 amp at 12 volts and consumes 3.1 watts of power as compared to 1.1 watts for the standard internal pump, thus increasing the total power consumption of the Model 202 Ozone Monitor to ~6 watts and the Model 205 Ozone Monitor to ~7 watts. As an upgrade, the external pump replaces the main air pump in the standard dual pump configuration; thus, when the external pump fails the smaller, internal backup air pump automatically turns on until the external pump is replaced. The external pump comes with a mounting bracket, connecting tubing and bulkhead connector. The external pump is available on new instruments and as an upgrade to used instruments for $500. Replacement external pumps (no installation hardware) sell for $350.
Flash Card Writer
Although all of our instruments have an internal data logger capable of logging months of continuous data, many customers prefer the convenience of logging onto Type 1 CompactFlash™ memory cards for reliable, fast and simple data transfer in the field. Using the provided 128 Mb flash card, up to 9 months of 10-s (ozone, internal temperature, internal pressure, date, time, and 3 analog inputs such as external temperature, pressure and humidity) can be logged. The Flash Card Writer allows for multiple power interruptions. When power fails, the current data file is closed and a new file is opened. Of course, each data line contains a date and time stamp. We offer flash memory as an option for new instruments and as an upgrade at a cost of $400.
Cold Weather Option and Upgrade
The cold weather option/upgrade allows the Model 202 and Model 205 Ozone Monitors to operate down to -20 oC. This upgrade includes a lamp heater and replacement of the main and backup sampling pumps with Thomas rotary vane pumps. These upgrades are required for operations below about 0 oC because the lamp may not turn on at low temperatures, and the polymer diaphragm becomes too stiff and causes the pump motor to burn out in the standard air pumps. This upgrade was developed in collaboration with the British Antarctic Survey, which operates 2B Tech Ozone Monitors outdoors throughout the winter in Antarctica. The Cold Weather Option is available on new instruments at a cost of $500 and as an upgrade to older instruments for $750 (includes main and backup air pumps in addition to the lamp heater.)
We offer an external battery that will operate a Model 202 Ozone Monitor for ~12 hours or a Model 205 Ozone Monitor for ~10 hours. This metal hydride battery weighs only 1.2 lb and comes with a fabric case with belt clip. It attaches to our instruments by means of the cigarette lighter adapter provided. Price for battery and charger is $350. Price for the battery alone is $300.
Our Garmin GPS option allows continuous recording of geographic position and altitude along with the other instrument measurements. The GPS option is available on new instruments and as an upgrade for $500.
We recommend use of an external filter to prevent contamination of the instrument by particulate matter. We offer a PVDF (Kynar®) filter holder for $100 and a pack of ten 5-6 micron PTFE (Teflon®) filters for $50.
For field use, we recommend having a few spare parts on hand for repairs. The air pumps, for example, have finite lifetimes, and the internal ozone scrubber should be replaced at least every six months of operation. Field Kits and spare parts may be purchased online here: Spare Parts
Also, please feel free to contact us at firstname.lastname@example.org about the parts you need or to return you instrument to us for repairs.