Product Description
The HI 6421P is a streamlined benchtop meter with a large touch screen display, comprised of a housing and an integrated module designed for fresh and saltwater measurements of dissolved oxygen.
The HI 6421P includes the HI764833 polarographic probe. Slim and versatile, this probe covers a wide range of dissolved oxygen and has a built-in thermistor temperature sensor that compensates for temperature variations. The slim design allows for convenient measurement in test tubes and Biological Oxygen Demand (BOD) bottles.
Durable and robust, the probe features a platinum cathode and Ag/AgCl anode assembly. Accurate and with a fast response time, readings are not flow dependent.
The probe is fitted with durable (PTFE), oxygen permeable, screw on membrane caps. Caps are filled with electrolyte and easily installed on the probe.
Concentration measurements are automatically compensated for barometric pressure, temperature, and salinity. Barometric pressure and temperature are automatically measured and compensated. Salinity is automatically compensated by setting manually the salinity concentration of the water being measured.
Pressure compensation is done automatically (built-in barometer) or users have the option to manually enter required value. Pressure is displayed in user-configurable units: mmHg, mbar, kPa, inHg, psi, atm.
User Interface
- 7-inch capacitive touch screen with multi-touch support
- Capacitive touch back, home and system menu keys
- User-friendly icons and symbols allow users to easily navigate and interpret the instrument functions.
Five Intuitive Views
- Basic measurement configuration
- Simple GLP with calibration information
- Full GLP with electrode status and calibration point details
- Live updated, interactive graph
- Tabulated data with date, time, and notes
Measurement
- Application-specific profiles allow quick and direct measurement without the need to update the sensor and system settings
- Active log during measurement
- Measurement stability indicator (using the Stability Criteria setting)
- Reading modes: direct and direct/autohold
- Temperature compensation can be automatic or set manually
- Audible and/or alarm messages for measurements outside of predefined limits
- Galvanic isolation for measurement
Calibration
- One or two points calibration at 0% and/or 100% saturation
- Single point manual calibration in mg/L or % saturation using a reference method
- Non-volatile memory saves data and settings
Zero Oxygen Calibration Solution: When performing a DO calibration, it is important that the correct standards are used. We include some starter solution to get you going. HI7040L is a bi-component zero oxygen solution designed so you can quickly calibrate to 0% oxygen concentration.
Logging
- Data log collection of up to 1,000,000 data points (with time and date stamp)
- Logging types: manual, automatic, autohold
- Sample ID for manual and autohold data
Connectivity Features & Services
- Transfer logged data to a USB thumb drive
- Log files that include measurements and calibration data (as .csv file)
- FTP and email for log export via Ethernet and Wi-Fi connection
- USB type A for USB stick, keyboard, and printer
- USB type C for USB stick and PC connection
Smart Cap Technology: Hanna's Smart Caps feature a built-in RFID reader that is able to store important data, including manufacture date and first-use date for increased traceabilty.
Longer Life.
Smart Caps last one year from the date of first use. Your meter will automatically count down from initialization and will have your meter remind you when it has expired with an on-screen message.
SPECIFICATIONS:
DO Range:0.00 to 90.00 mg/L (ppm) concentration; 0.0 to 600.0% saturation
DO Accuracy (@25°C/77°F): ±1.5 % of reading ±1, least significant digit
DO Resolution: 0.01 mg/L (ppm); 0.1% saturation
DO Calibration: Automatic-two points / User standard-single point
Temperature Range: -20.0 to 120.0°C / -4.0 to 248.0°F / 253.0 to 393.0 K
Temperature Resolution: 0.1°C; 0.1°F; 0.1 K
Temperature Accuracy: ±0.2°C; ±0.4°F; ±0.2 K
DO Probe: HI 764833 Polarographic probe
*****REQUEST PRICING ON OPTION WITH AN OPTICAL DO PROBE*****
The following link provides additional information from the manufacturer's brochure. Click to open the PDF in a new window or right-click to download it:
HI 6421 Benchtop Oxygen Meter or copy the following into your browser address window: labequip.com/stock/pictures/n2293.pdf
ACCESSORIES:
COMES COMPLETE WITH:
HI 764833 polarographic probe
HI 764060 electrode holder
capillary pipette
USB-C to USB-A cable
probe quality certificate
quick reference guide quality certificate
OPTIONAL ACCESSORIES AVAIABLE AT ADDITIONAL COST:
DO SOLUTIONS
- HI 7040L Zero oxygen solution set, 500 mL + 12 g
- HI7 041S Refilling electrolyte solution, 30 mL
OTHER ACCESSORIES
- HI 740036P 100 mL beaker (10 pcs.)
- HI 740037P 20 mL beaker (10 pcs.)
- HI 764080A/P Spare membranes (5 pcs.)
- HI 764113-1 DO Smart Cap with O-ring
- HI 764113-2 Calibration / storage vessel
- HI 7641133 Optical DO probe (opdo ® )
- HI 764060 Electrode holder
- HI 764833 Polarographic DO probe
- HI 900946 115 Vac to24 Vdc power adapter, US plug
- HI 900947 230 Vac to 24 Vdc power adapter, European plug
- HI 920016 USB type A to C cable
