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Code HI656321

Benchtop conductivity meter with advanced features HI 6321

Conductivity/Resistivity/TDS/Salinity meter

The HI6321 is an advanced benchtop meter designed for professional Conductivity/Resistivity/TDS/Salinity measurement.

Featuring a large, intuitive touchscreen and innovative features, this device is perfect for a wide range of applications from potable water to industrial process water.

The included HI7631233 four-ring probe provides stable measurements over a wide range and requires infrequent calibration.

With its built-in temperature sensor, the HI6321 provides accurate analysis with automatic temperature compensation, making it essential for precise water quality assessment.
  • Advanced Touchscreen Interface
  • Multiple Scales of Measurement
  • Internet connection

Temperature sensor

The integrated temperature sensor measures the sample temperature and allows automatic compensation during analysis, with the possibility of choosing the type of algorithm to apply:

  • Linear : appropriate when the temperature coefficient of variation is assumed to have the same value for all measured temperatures

  • Standard : Suitable for high purity water analysis and documented in ASTM D5391-14. This setting should be used for resistivity measurements >1Mohm.cm.

  • Natural : Suitable for natural groundwater, well or surface water (or water with similar composition) according to ISO7888 standard.

The result is a reliable analysis of conductivity (EC), TDS (Total Dissolved Solids), resistivity or salinity of seawater (percentage units, PSU or ppt).

TDS Factor

TDS is a calculated value based on the conductivity of the solution (TDS = factor x EC25). A TDS factor is a conversion factor used to change an EC measurement to a ppm measurement.

Salinity expressed in PSU (Practical Salinity Unit)

Practical salinity of seawater relates the electrical conductivity ratio of a normal seawater sample at 15 °C and 1 atmosphere to a potassium chloride (KCl) solution with a mass of 32.4356 g/kg of water at the same temperature and pressure. Under these conditions the ratio is equal to 1 and S=35. Practical salinity scale can be applied to values ​​from 0 to 42.00 PSU at temperatures between 0 and 35 °C.

Salinity expressed in ppt

Measurements expressed in ppt are based on the natural seawater scale which ranges from 0.00 to 80.00 g/L and covers a temperature range of 10 to 31 °C. Determine salinity based on a ratio of the sample conductivity to standard seawater at 15 °C and an approximate salinity value of 35 in seawater.

Salinity expressed in %

On this scale, 100% salinity equals approximately 10% solids.

Detailed Specifications

Measurement

  • Measurement scales: μS/cm, mS/cm (Conductivity); Ω cm, kΩ cm, MΩ cm (Resistivity); ppm, ppt (TDS); ppt, PSU, % (Salinity) and temperature
  • Recording function active during measurements
  • Measurement stability indicator (using the Stability Criteria setting)
  • Reading Mode: Direct and Direct with Autohold
  • Automatic temperature compensation (via temperature probe) or manually set
  • Acoustic and/or alarm messages for measurements outside the predefined limits
  • Galvanically isolated probe input to avoid electrical interference during measurements
ParametroDescrizione
EC Scala 0.000-9.999 μS/cm; 10.00-99.99 μS/cm; 100.0-999.9 μS/cm;   1.000-9.999 mS/cm; 10.00-99.99 mS/cm; 100.0-1000.0 mS/cm
Risoluzione 0.001 μS/cm; 0.01 μS/cm; 0.1 μS/cm; 0.001 mS/cm; 0.01 mS/cm;   0.1 mS/cm
Accuratezza ±1 % of reading (±0.01 μS/cm)
Resistività Scala 1.0-99.9 Ω·cm; 100-999 Ω·cm; 1.00-9.99 KΩ·cm; 10.0-99.9 KΩ·cm;   100-999 KΩ·cm; 1.00-9.99 MΩ·cm; 10.0-100.0 MΩ·cm
Risoluzione 0.1 Ω·cm; 1 Ω·cm; 0.01 KΩ·cm; 0.1 KΩ·cm; 1 KΩ·cm; 0.01 MΩ·cm;   0.1 MΩ·cm
Accuratezza ±1 % of reading (±1 Ω·cm)
Solidi Totali   Disciolti (TDS) Scala 0.000-9.999 ppm; 10.00-99.99 ppm; 100.0-999.9 ppm; 1.000-9.999   ppt; 10.00-99.99 ppt; 100.0-400.0 ppt; actual TDS (with 1.00 factor)
Risoluzione 0.001 ppm; 0.01 ppm; 0.1 ppm; 0.001 ppt; 0.01 ppt; 0.1 ppt
Accuratezza ±1 % of reading (±0.01 ppm)
Salinità Scala 0.00-42.00 PSU - Practical Scale; 0.00-80.00 ppt - Natural Sea   Water; 0.0-400.0 % - Percent Scale
Risoluzione 0.01 for Practical Scale / Natural Sea Water; 0.1 % for   Percent Scale
Accuratezza ±1 % della lettura
Temperatura Scala −20.0-120.0 °C
Risoluzione 0.1 °C
Accuratezza ±0.2 °C
Calibrazione EC Punti di calibrazione Riconoscimento automatico dei tamponi / valori impostabili   dall'utente, singolo punti /più punti
Soluzioni 84.00 µS/cm, 1.413 mS/cm, 5.000 mS/cm, 12.88 mS/cm, 80.00   mS/cm, 111.8 mS/cm
Avviso Disabilitato; Giornaliero: 0 min. fino 23 ore e 59 min;   Periodico: 1 min. a 500 days, 23 ore e 59 min.
Calibrazione Resistività Come Conducibilità
Calibrazione Salinità 1 punto per scala percentuale
Compensazione Temperatura Automatica o Manuale
Lettura Modalità Diretta; Diretta/Autohold
Stabilità Accurato; Medio; Veloce
Frequenza di campionamento 1000 ms
Visualizzazioni Base Misurazione (EC, Resistività, TDS, Salinità, Temperatura); Stato di   stabilità
GLP semplice Informazioni di base; Ultima data di calibrazione, offset
GLP completa Informazioni GLP Semplici e dettagli del punto di calibrazione
Tabella Le misurazioni aggiornate ogni secondo vengono visualizzate in tabella
Grafico l grafico della misurazione nel tempo può essere spostato o ingrandito   (tecnologia pinch-to-zoom)
Registrazione dati Tipo Automatica, Manuale, Autohold
Numero di record Massimo 50.000 per file; Memorizza almeno 1.000.000 di punti dati per   utente
Intervallo automatico 1, 2, 5, 10, 30 secondi; 1, 2, 5, 10, 15, 30, 60, 120, 150, 180 minuti
ID campione Incrementale
Formato esportazione .csv file
Utenti Fino a 9 utenti e l'account amministratore   predefinito
Connettività USB-A 2 porte per l'inserimento della tastiera o chiavetta USB
USB-C 1 porta per la connettività al PC e chiavetta USB-C
Wi-Fi & Ethernet FTP; Server web per trasferimento e download dei log; Email
RS232 Collegamento per periferiche
Alimentazione Adattatore DC 100-240AC a 24VDC 2.5A
Condizioni di utilizzo 0 - 50 °C    massimo 95% RH senza condensa
Dimensioni 205 x 160 x 77 mm
Peso Circa 1.2 kg

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