Dissolved Oxygen

HI 4421 Research Grade Dissolved Oxygen and BOD Meter HANNA’ s research grade bench meter line expands to include HI 4421. The fully customizable HI 4421 features DO, BOD, OUR and SOUR measurement modes in a compact versatile instrument. The color graphic LCD is capable of displaying graphs, soft key menus, help screens and calibration reminders. HI 4421 also incorporates an intuitive menu system to help streamline your workflow process and provide accurate measurements quickly and efficiently. The large log memory offers 100 lots with 10, 000 records per lot. Measurements can be transferred to a PC via USB or RS 232 with HANNA software. HI 2400 Dissolved Oxygen Meter HI 2400 is a dissolved oxygen benchtop meter with automatic calibration and an extended range to measure up to 300% or 45 ppm. This instrument allows for temperature and salinity compensation as well as altitude compensation up to 4000 m. Dissolved oxygen measurements are displayed in parts per million ( ppm= mg/ L) or in % saturation. The polarographic probe uses screw-on membranes for simple replacement. The automatic logging interval can be set to perform analysis and store data in non-volatile memory. All logged data can be transferred to your PC through the USB port. Memory can store up to 8000 samples. HI 9147 Dissolved Oxygen Meter for Aquaculture HI 9147 are specially designed for aquaculture applications. This unit is unique among our family of DO meters, it is supplied with a galvanic probe. Unlike polarographic probes, galvanic DO probes require no conditioning time. When you need to measure multiple samples in a given period of time, pick it up and measure on demand. HI 9147 is a must have for DO sensitive organisms or high bio-load environments.