Flow-thru adapter is universally designed to accept all 12mm diameter pH electrodes and conductivity probes. It allows constant monitoring of flowing fluids with a standard dip probe. Two O-rings provide a secure, leakproof seal. Connectors accept all tubing with a 1/8-inch to 3/16-inch inside diameter. Cell volume depends on the positioning of the probe (approximately 2 to 4 mL). Flow rate may be from 0.001 to 50mL per minute. Constructed of TeflonŽ (universally chemically inert), it may be in constant use at temperatures from -100 to +500°F. Size is 1 inch diameter x 2.2 inches.