High resolution meters

The first line of defense to safely using natural gas is an effective odorization program. An effective program is one that constantly monitors the gas flow, computes and injects the proper dosage of odorant, and most importantly records this activity. The odor threshold of mercaptans is approximately one part per billion. Typical mercaptan doses are in the range of 2 - 4 ppm (by volume, to gas); this translates to about 1 - 200 cc/min, depending on pipeline size and natural gas velocity.
MAX Equipment Specified: The MAX-213 meter is used when the minimum dosage rate (averaged out on an instantaneous basis) falls below 40 cc/min; the 214 meter is used when the minimum rate is over 40 cc/min or the maximum rate is over 1500 cc/min. Typical applications are either in the 1 - 10 cc/min or in the 50 - 200 cc/min ranges. A solid state transmitter is required because of low flow and sudden on-off conditions usually associated with mercaptan injections (since plunger-type pumps typically are used, intermittent and/or pulsating flow rates are the rule).