HQD HQ440D Laboratory pH and Conductivity Meter (PHC281 + CDC401)

Brand: HACH
Availability: OutOfStock

HQD HQ440D Laboratory pH and Conductivity Meter (PHC281 + CDC401)

Brand: HACH

Product Code: HQD440

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Specifications: (see all)

Measured / controlled parameters

pH, ORP (mV), conductivity, total dissolved solids (TDS), salinity, resistivity, dissolved oxygen (DO), oxygen saturation, BOD, ion-selective measurements (ammonium, ammonia, chloride, fluoride, nitrate, sodium), temperature

Measurement / analysis range

pH: 0–14 pH; mV: −1500…1500 mV; Conductivity: 0.01 µS/cm…200.0 mS/cm; TDS: 0.00 mg/L…50.0 g/L; Salinity: 0–42 ppt; Resistivity: 2.5 Ω·cm…49 MΩ·cm; DO: 0.1–20.0 mg/L, 1–200% saturation; Temperature: −10…+110 °C

Measurement accuracy / precision

pH: ±0.002 pH; mV: ±0.1 mV; Conductivity: ±0.5% FS; DO: ±0.1 mg/L; Salinity: ±0.1%

Temperature measurement range

−10…+110 °C

Temperature compensation

Automatic compensation for pH, conductivity, DO (barometric)

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The HQD HQ440D Laboratory pH and Conductivity Meter is a high-precision device designed for professional water quality monitoring in laboratory and industrial applications. This model comes with the reliable PHC281 pH electrode and CDC401 conductivity cell, enabling simultaneous measurement of pH and conductivity with excellent accuracy and stability. The instrument features an intuitive interface, a large graphic display, and data storage capability, making operation easier and speeding up analysis. Automatic Temperature Compensation (ATC) ensures correct results even when sample temperature varies. The HQD HQ440D is widely used in environmental monitoring, drinking and wastewater analysis, aquaculture, food industry, and scientific research. Its robust housing and long-lasting electrodes ensure extended service life without loss of precision

Tags: Water analysis

Water analysis

Measured / controlled parameters

Measurement / analysis range

Measurement accuracy / precision

pH: ±0.002 pH; mV: ±0.1 mV; Conductivity: ±0.5% FS; DO: ±0.1 mg/L; Salinity: ±0.1%

Temperature measurement range

−10…+110 °C

Temperature compensation

Automatic compensation for pH, conductivity, DO (barometric)

Analysis method / operating principle

Electrochemical methods using replaceable electrodes and parameter-specific sensors

Measurable concentration range of substances

Depends on the ion-selective electrode used (ammonium, chloride, fluoride, nitrate, sodium, etc.)

Analysis / measurement time

Instant real-time measurement display

Cuvette / electrode / sensor type

pH: PHC281; Conductivity/TDS/Salinity: CDC401; DO: LDO or LBOD probes; ISE: respective sensor

Number of measurement channels

2 channels (Multi/2 Channels)

Availability of automatic mode / programmable cycles

Auto-stabilization (“press to read”), automatic data saving, interval measurement selection

Sample volume / sample volume range

—

Housing / working part material

Housing with IP54 protection (resistant to water splashes, dust-proof)

Housing protection class (IP)

IP54

Interfaces and outputs

USB Type A and Type B for PC, printer, keyboard, flash drive

Software / PC compatibility

HQD Series Meter Data Transfer Utility

Memory / data storage availability

500 records / FIFO, automatic storage with calibration data

Display / indication type

Graphic LCD display 440×160 px with backlight

Calibration

pH: 1–3 points; DO: 0–100% or mg/L with 0-point; ISE: 2–5 points; ORP: by ORP standards

Light source / detector type

—

Power supply

4 × AA batteries, AC 100–240 V power adapter

Battery life

—

Operating conditions (temperature, humidity)

0…+60 °C, humidity up to 90% (non-condensing)

Dimensions

859×175×235 mm

Weight

750 g (without batteries), 850 g (with batteries)

Scope of supply

HQ440D meter, PHC281 electrode, CDC401 cell, pH buffers 4.01/7.00/10.01, electrode storage solution, NaCl standard, stand with electrode holder, power adapter, USB cables, user manual

Certificates and compliance with standards

CE, WEEE

Additional functions

Printer connectivity, automatic data transfer to PC or USB, custom buffer sets, calibration alerts and reminders

Country of origin

USA

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