ROYTRONIC EXCEL Series AD chemical metering pumps from LMI Pumps have a design-fitting system for secure, leak-proof tubing connections. Every pump with a standard FASTPRIME or optional AUTOPRIME (degassing) liquid end includes 1/2-inch NPT connections for ease of configuration. High-viscosity liquid ends are available. They are capable of pressures to 250 psi and flows up to 2 gph and include an LCD user interface. Models can include external pacing, alarms and pulse/4-20 mA input and output capability. 215/293-0401; www.lmipumps.com.