เครื่องมือวัด Oxygen Meter เครื่องวัดออกซิเจน DO Meter

HI4421 เครื่องวัดออกซิเจน

HI4421เครื่องวัดออกซิเจน ในน้ำ รุ่น HI4421 

Research Grade Dissolved Oxygen and BOD Meter

  • Extended DO range up to 90 ppm (mg/L) and 600%

  • Measures DO, atmospheric pressure and temperature

  • DO direct, DO direct/autohold, BOD: Biological Oxygen Demand, OUR: Oxygen Uptake Rate, SOUR: Specific Oxygen Uptake Rate

  • Temperature and atmospheric pressure automatic compensation

  • Manual salinity compensation

  • Fully customizable

  • Large log memory using different logging methods

  • Polarographic probe with built-in temperature sensor

HI 4421 is a research grade dissolved oxygen bench meter with extensive capabilities in measuring DO as BOD (Biological Oxygen Demand), OUR (Oxygen Uptake Rate), SOUR (Specific Oxygen Uptake Rate), atmospheric pressure and temperature.
DO measurements can be performed in ppm (mg/L) range or in % and feature automatic or manual temperature and atmospheric pressure compensation and manual salinity compensation.

Automatic and manual calibration of DO can be performed in one or two points using standard or user defined standards. Users can set the reading stability criteria; three modes are available: Fast, Medium and Accurate. Direct/autohold auomatically holds the reading on display when measurement stability is reached. In direct reading mode, the user interface can be set to basic with or without GLP, graphic or logging information.

These instruments offer multi-language support and contextual help is available through a dedicated Help key. Clear tutorial messages and directions are available on-screen to quickly and easily guide users through all measurement and calibration procedures to ensure measurements and procedures are performed properly.

The BOD, OUR and SOUR methods are supported with a dedicated tutorial and step by step indication in order to assure a full and correct reading of DO using this specific measuring method.

The DO probe is using the polarographic principal of measurement and has a built-in temperature sensor.

Up to 10 profiles can be saved and recalled eliminating the need to reconfigure each time when a different electrode is used. User definable configurations can include reading mode: direct or BOD, OUR, and SOUR, measurement units, temperature units, stability criteria, and temperature, atmospheric pressure and salinity compensation.

Three selectable logging modes are available: Automatic, Manual and AutoHold logging. Up to 100 logging lots can be stored for automatic or manual modes. Automatic logging features a selectable area and sampling period while GLP information includes complete data about user calibration of each parameter and identification information for the instrument, user, and company. Data can be transferred to a PC via the opto-isolated PC interface via the RS232 or USB ports and HI 92000 software (optional).

Specifications:

Range

Dissolved Oxygen

0.00 to 90.00 ppm; 0.0 to 600.0 % saturation

 

Barometric Pressure

450 to 850 mmHg; 560 to 1133 mBar

 

Temperature

-20.0 to 120.0°C; -4.0 to 248°F; 253.1 to 393.1 K

Resolution

Dissolved Oxygen

0.01 ppm; 0.1% saturation

 

Barometric Pressure

1 mm Hg

 

Temperature

0.1°C/°F/K

Accuracy

Dissolved Oxygen

±1.5% of reading ±1 digit

 

Barometric Pressure

±3 mm Hg + 1 least significant digit

Measurement

Modes

 

direct DO; BOD (biochemical oxygen demand); OUR (oxygen uptake rate); SOUR (specific oxygen uptake rate)

Calibration

Dissolved Oxygen

automatic/user standard, one or two points

 

Barometric Pressure

single point

Temperature

Compensation

 

0.0 to 50.0°C; 32.0 to 122.0°F; 237.1 to 323.1 K

Salinity

Compensation

 

0 to 45 g/L (ppt)

Probe

 

thin body, polarographic dissolved oxygen probe with internal temperature sensor and 1 m (3.3’) cable (included)

Logging

Record Samples

up to 100 lots; 10,000 samples/lot for automatic logging; 5000 samples/lot for manual logging

 

Logging Interval

from one second and up

 

Type

manual, automatic

GLP Features

 

yes (last calibration data, calibration info)

Alarm (DO, BOD, OUR, SOUR)

 

inside and outside limits

PC Connection

 

opto-isolated USB and RS232

Display

 

graphic color LCD with on-screen help, graphing, language selection and custom configuration

Power Supply

 

12 VDC adapter (included)

Dimensions

 

160 x 231 x 94 mm (6.3 x 9.1 x 3.7”)

Weight

 

1.2 Kg (2.6 lbs.)