YSI Pro Plus Quatro w/ Flow Cell Rental Model 105 Pump operation Maximum hose length

Pump operation Maximum hose length 45 m

75" Diameter Pump - Not Compatible

Alarms: 95dB at 12” (30 cm) buzzer and flashing red LED to indicate exceeded preset limits • High: 3 beeps and flashes per second • Low: 2 beeps and flashes per second • STEL and TWA: 1 beep and flash per second • Alarms latching with manual override or automatic reset • Additional diagnostic alarm and display message for low battery and pump stall

10 to 25 °C

Phosgene is displayed with roughly the same sensitivity as carbon tetrachloride

YSI Pro Plus Quatro w/ Flow Cell Rental Model 105 Pump operation Maximum hose lengthThe YSI Professional Plus handheld has been discontinued as of March 31, 2021. The direct replacement is the ProQuatro multiparameter handheld. See the FAQ tab below or visit the ProQuatro page for more information. The Pro Plus multiparameter meter provides extreme flexibility for the measurement of a variety of combinations for dissolved oxygen, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH ORP