Advanced Dissolved Oxygen Benchtop Meter with Polarographic DO Probe (HI6421P-02)

Description

HI6421P 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.

HI6421P 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.

Additional features include built-in methods and calculations for the measurement of BOD (Biological Oxygen Demand), OUR (Oxygen Uptake Rate), and SOUR (Specific Oxygen Update Rate).

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.

Features at-a-glance

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

The user can select between five different 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

Measure %Sat, mg/L, ppm (DO); mg/L, ppm (BOD); mg/L (OUR); ppm, mg/L (SOUR)
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/auto-hold
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

Logging

Data log collection of at least 1,000,000 data points (with time and date stamp)
Logging types: manual, automatic, auto-hold
Sample ID for manual and auto-hold data

Connectivity features & services

Transfer logged data ta 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

Help section for meter guidance

Video support presentation of main functionalities

Primary Applications:

Fresh water and saltwater applications, aquaculture, aquariums, environmental.

Additional information

Weight	12.02 kg
Parameter	Dissolved, Oxygen

Specifications

SKU	HI6421P-02
Product Name	Advanced Dissolved Oxygen Benchtop Meter with Polarographic DO Probe – HI6421P
Quote Required	Yes
DO (HI764833 Polarographic probe) Range	0.00 to 90.00 mg/L (ppm) concentration; 0.0 to 600.0 % saturation
DO (HI764833 Polarographic probe) Resolution	0.01 mg/L (ppm); 0.1 % saturation
DO (HI764833 Polarographic probe) Accuracy	±1.5 % of reading ±1, least signiﬁcant digit
Barometric Pressure Range	450 to 850 mmHg; 600 to 1133 mBar; 60 to 133 kPa; / 17 to 33 inHg; 8.7 to 16.4 psi; 0.592 to 1.118 atm
Barometric Pressure Resolution	1 mmHg; 1 mBar; 1 kPa; 1 inHg; 0.1 psi; 0.001 atm
Barometric Pressure Accuracy	±3 mmHg within ±15 % from the calibration point / ±3 mmHg ±1 least signiﬁcant digit
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 Calibration Points	Automatic-two points / User standard-single point
DO Calibration Standards	0 and 100% saturation
DO Calibration Reminder	Disabled / Daily
Temperature Compensation	Automatic or Manual
Reading Modes	Direct Direct/Autohold
Reading Stability criteria	Accurate Medium Fast
Reading Isopotential	7.000 or 4.010
Reading Sampling rate	1000 ms
DO Views Basic	Measurement (DO, Temperature) Stability status
DO Views Simple GLP	Basic view information Last calibration date, oﬀset, average slope
DO Views Full GLP	Simple GLP information and calibration point details
DO Views Table	Measurements updated every second are displayed in table
DO Views Graph (Plot)	Measurement versus time graph can be panned or zoomed (pinch-to-zoom technology)
Logging Type	Automatic, Manual, Autohold
Logging Number of records	50 000 maximum per ﬁle Stores at least 1 000 000 data points per user
Logging Automatic interval	1, 2, 5, 10, 30 seconds / 1, 2, 5, 10, 15, 30, 60, 120, 150, 180 minutes
Logging Sample ID	Incremental mode
Logging Export option	.csv ﬁle format
Users	Up to 9 users and the default administrator account
Connectivity USB-A	2 ports for keyboard input or USB thumb drive
Connectivity USB-C	1 port for PC connectivity and USB-C type thumb drive
Connectivity Wi-Fi & Ethernet	FTP / Web server Log transfer and download Email
Connectivity RS232	Connecting peripherals
Power supply	DC adapter 100-240AC to 24VDC 2.5A
Environment	0 – 50 °C / 32 – 122 °F / 273 – 323 K maximum 95% RH non-condensing
Dimensions	205 x 160 x 77 mm (8.0 x 6.2 x 3.0 “)
Weight	Approximately 1.2 kg (26.5 lbs.)

Ordering Information

Ordering Information:

HI6421P is supplied with HI764833 polarographic probe; HI764060 electrode holder; capillary pipette; 24 VDC power adapter; USB-C to USB-A cable; probe quality certificate; quick reference guide with instrument quality certificate.

Accessories:

HI76483 polarographic dissolved oxygen probe

HI76483A/P DO membranes

HI7041S refilling electrolyte solution, 30 mL

HI7041M refilling electrolyte solution, 230 mL

HI7041L refilling electrolyte solution, 500 mL

Downloads

Quick Reference

Advanced Dissolved Oxygen Benchtop Meter Quick Reference Guide – HI6421P