Solinst 407 Bladder Pump Configuration:1.0" Stainless Steel x 2ft - 316 SS Balls The WTW FDO® 925 is

The WTW FDO® 925 is a digital IDS optical dissolved-oxygen sensor that requires no membranes

Typical uses include detecting LNAPL (floating product like gasoline or oil) and DNAPL (sinking dense product) layers in groundwater monitoring wells

tablet-style meter with a 5

Its compact size and durable construction make it perfect for carrying in your pocket

real-time readings

Solinst 407 Bladder Pump Configuration:1.0" Stainless Steel x 2ft - 316 SS Balls The WTW FDO® 925 isThe Solinst 407 Mk2 Bladder Pump is a pneumatically driven groundwater sampling pump built around a flexible Santoprene bladder inside a rigid stainless steel or PVC body. Compressed air or nitrogen from a surface control unit pressurizes the space between the bladder and the housing, collapsing the bladder and forcing the water inside it up through a check valve to the discharge line; venting the drive pressure lets the bladder re expand and refill