برند
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Hach
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Temperature correction
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None; Linear; NaCl Non-Linear Natural Water.
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Automatic Buffer Recognition
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Yes
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Backlight
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Yes
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Barometric Pressure Measurement
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Automatic compensation of DO when using an LDO or LBOD probe
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Calibration
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Demal (1D/ 0.1D/ 0.01D);
Molar (0.1M/ 0.01M/0.001M);
NaCl (0.05%; 25µS/cm; 1000µS/cm; 18mS/cm);
Standard sea water;
User defined
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Calibration Intervals/Alerts/Reminder
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Off, selectable from 2 hours to 7 days
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Communication
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Integrated USB type A (for USB 2.0 flash memory device, printer, keyboard) and Integrated USB type B (for PC)
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Compliance Certifications
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CE.WEEE
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Conductivity measurement
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Yes
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Conductivity Measurement Range
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0.01 µS/cm – 200.0 mS/cm
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Conductivity resolution
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0.01 µS/cm – 0.1 mS/cm upon selected measuring range
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Contents
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Meter Only
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Custom Calibration Standards
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Yes
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Data Export
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Download via USB connection to PC or flash memory device. Automatically transfer entire data log or as readings are taken.
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Data Memory
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500 records/FIFO
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Data Storage
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Automatic, GLP ISO compliant reading data stored with calibration details.
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Display
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Detailed mode/Large mode
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Display Type
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440 x 160 pixel LCD with backlight illumination
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DO Measurement Range
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0.1 – 20.0 mg/L (ppm) 1 – 200% saturation
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DO Resolution
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0.1
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DO sensor calibration
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• 100% (water-saturated air (100%) calibration
• 100% with 0 (water-saturated air (100%) calibration with 0 point
• mg/L (calibration with a specified dissolved oxygen concentration (mg/L) solution)
• mg/L with 0 (calibration with a specified dissolved oxygen concentration (mg/L) solution with 0 point)
• Factory (calibration with the default LDO calibration)
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Electrode stand
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Optional
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GLP Features
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Date; Time; Sample ID; Operator ID
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Instrument
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Bench
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IP Rating
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IP54 (Resistant to spray of water; Dust-proof)
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ISE Direct Measurement Range
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Yes
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ISE Electrode Calibration
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2 – 5 points
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Kit?
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No
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Languages
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English, French, German, Italian, Spanish, Danish, Dutch, Polish, Portuguese, Turkish, Swedish, Czech, Russian
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Lock Function
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Continuous / Auto-stabilization ("press to read") / At Interval
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Measurement Method
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Probe specific programmed method settings
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Model
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HQ440D – Multi/2 Channels
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mV Measurement at Stable Reading
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Yes
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mV Measurement Range
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-1500 – 1500
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mV Resolution
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0.1 mV
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Needed Cable Length
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NA
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Operating Error Messages
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Clear text error messages displayed
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Operating Humidity
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90 % relative humidity (non-condensing)
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Operating Interface
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Soft Touch Keypad
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Operating Temperature
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0 – +60 °C (32 – 140 °F)
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ORP Electrode Calibration
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Predefined ORP standards (including Zobell's solution)
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Parameter
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pH/Oxydo Reduction Potential (ORP)
Conductivity/Total Dissolved Solid (TDS)/Salinity/Resistivity
Dissolved Oxygen (DO)
Biochemical Oxygen Demand (BOD)
Ion Selective Electrode (ISE): Ammonia, Ammonium, Chloride, Fluoride, Nitrate, Sodium
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PC Data Transfer Software
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HQD Series Meter Data Transfer Utility
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pH Buffer Sets
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Color-coded: 4.01, 7.00, 10.01 pH;
IUPAC: 1.679, 4.005, 7.000, 10.012, 12.45 pH
DIN: 1.09, 4.65, 9.23 pH
User-defined custom buffer sets
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pH Electrode calibration
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1 – 3 Calibration points
Calibration summary data logged and displayed
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pH Measurement Range
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0 – 14 pH
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pH Resolution
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Selectable:
0.001/0.01/0.1 pH
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Printer
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Yes, Optional
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Probes included
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None
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Resistivity Measurement
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2.5 Ω.cm – 49 MΩ.cm
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Resistivity Resolution
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0.1
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Salinity Measurement Range
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0 – 42 (ppt) (‰)
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Salinity Resolution
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0.01 (ppt) (‰)
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Sensor A
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NA
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Sensor B
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NA
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Sensor C
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NA
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Sensors
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Sensor A: NA
Sensor B: NA
Sensor C: NA
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Simultaneous measurements
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Yes
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TDS Measurement Range
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0.00 mg/L – 50.0 g/L as NaCl
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TDS Resolution
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0.01 mg/L – 0.1 g/L upon measuring range.
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Temperature Compensation
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Automatic Temperature compensation for pH
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Temperature Measurement
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°C or °F
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Temperature Range
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-10°C – 110 °C
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Temperature Resolution
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0.1
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Type of measurement
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Lab Water Quality applications.
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What's included?
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Meter package includes HQ440D Laboratory Dual Inputs, Multi-Parameter Meter – pH, Conductivity, Optical Dissolved Oxygen, ORP, and ISE, 4 AA batteries, universal power adapter, USB cable for data transfer, quick start guide and user manual
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