Barometric Pressure Measurement: For automatic compensation of DO when using an LDO or LBOD probe

BOD5/CBOD resolution: Available when used with Hach WIMS BOD Manager Software

Cable resistance correction: Digital - not needed

Calibration curves display: Calibration summary data logged and displayed

Calibration Intervals/Alerts/Reminder: 2 hours to 7 days

Compliance: CE

Conductivity Accuracy: 0.5 µS/cm

Conductivity Measurement Range: 0.01 µS/cm to 400 µS/cm

Conductivity measurement: Temperature correction: Temperature correction

Conductivity resolution: 0.01 µS/cm with 2 digits

Custom Calibration Standards: User-defined standard sets

Data Export: Download via USB connection to PC or flash memory device. Automatically transfer entire data log or as readings are taken.

Data Memory: 500 results

Digital (intelligent) electrode inputs: 2 channel

Dimensions (H x W x D): 7.8 in x 3.7 in x 1.2 in (197 mm x 95 mm x 30 mm)

Display: Display readings from one or two probes
Simultaneous readings from two probes (HQ440d only)
pH: pH, mV, temperature
Conductivity: Conductivity, TDS, salinity, resistivity, temperature
LDO: dissolved oxygen, pressure, temperature
LBOD: dissolved oxygen, pressure, temperature
ORP/Redox: mV, temperature
Sodium: Sodium, mV, temperature

Display Lock Function: Continuous measurement or press to read mode available with averaging function for LDO measurement.

Display Type: 240 x 160 Display readings from one or two probes
Simultaneous readings from two probes
pH: pH, mV, temperature
Conductivity: Conductivity, TDS, salinity, resistivity, temperature
LDO: dissolved oxygen, pressure, temperature
ORP/Redox: mV, temperature
Sodium: Sodium, mV, temperature

DO Measurement Range: 0.01 to 20 mg/L (ppm)

DO Resolution: 0.01 mg/L

Fixed Buffer Selection: IUPAC standards (DIN 19266) or Technical buffer (DIN 19267) or 4-7-10 series or user defined

Inputs: M12 digital (1) for IntelliCAL probes

Interface Languages: 13

Internal Data Storage: 500

IP Rating: IP54 (Resistant to spray of water; Dust-proof)

ISE Direct Measurement Range: Yes

Languages: English, French, German, Italian, Spanish, Danish, Dutch, Polish, Portuguese, Turkish, Swedish, Czech, Russian

mV Accuracy: 0.1 mV

mV Measurement Range: -1500 to 1500 mV

mV Resolution: 0.1 mV

Operating Error Messages: Text messages displayed

Operating Humidity: 90 % relative humidity (non-condensing)

Operating Interface: Keypad

Operating Temperature: 5 to 45 °C

Operating Temperature Range: 0 to 60 °C

Outputs: USB to PC / flash memory device

PC Data Transfer Software: Included

pH Measurement at stable reading: 5 stabilization settings

pH Resolution: 0.001 0.1 pH

Printer: Optional accessory

Salinity Measurement Range: 0 to 42 ppt

Salinity Resolution: 0.01 ppt

TDS Measurement Range: 0 to 50000 mg/L

TDS Resolution: 0.01 mg/L