The ECHO “Arrow Hunter PLUS - Handheld” is a portable clamp-on Transit-Time flowmeter for any clean or dirty liquids. It will measure flow in metal or plastic pipes with any liners from 3/8” to 118” diameters. It uses Dual DSP technology and measures flow velocity from 0.03 to 82 ft/s. Accuracy is +/- 0.5% factory calibrated (process conditions can reduce accuracy). We can measure any municipal flow application, including low-flow chemical feed to large concrete-lined raw sewage pipes.