Denver Instrument™ Series 200 Benchtop Research-Grade Multiparameter Meters

Research-grade meters for multiparameter measurements


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Catalog No. 02-226-161


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    Includes Meter, power supply, electrode support arm and operating manual

    Easy-to-operate models for multiple measurements
    Model 220 displays both pH and conductivity measurements at one time
    Model 225 is ideal for ion-selective analyses, pH and mV measurements
    Model 250 is the multimeter for electrochemical analyses of concentration, conductivity, TDS, salinity, pH and mV
    (For the most accurate pH measurement (±0.002), choose Model 215, described under Electrochemistry/pH Meters. )
    Single-button, menu-driven operation

    • MODE selects pH, mV, ion, or conductivity; press STANDARDIZE to standardize your measurements
    • CAL DATA displays complete calibration data, including buffers/standards, time/date, slope, cell constant, and calibration line graphs
    • CHANNEL allows you to see one to three parameters at one time
    • Use SETUP to control meter operations
    • DATALOG sets up datalogging and viewing of stored measurements
    • CLEAR cancels an input or returns to previous screen
    • ENTER/PRINT enters selections or prints current results. “Soft keys” provide quick access to the most frequently used features, including context-sensitive help
    • Enter standards and parameters with the numeric keypad
    All models have RS-232-C bidirectional input/output
    • Output results with sample alphanumeric description or ID number, result, units, time, date, temperature, channel and stability indication
    • Print at programmed time intervals or by serial port command.
    • Calibration points are time- and date-stamped, and electrode/cell calibration information can be recalled and printed for GLP documentation
    • Meters automatically prompt when recalibration is needed.
    • Internal datalog stores up to 620 results for viewing or downloading
    • Multiline 53/4 in. backlit display shows time, date, current buffers, temperature, electrode slope, and current value; prompts for input data

    Model Selection
    Model 220

    • For simultaneous pH and conductivity measurements, even with electrodes in the same solution
    • Switches from conductivity to NaCl salinity, practical salinity, resistivity, or Total Dissolved Solids
    • Automatically selects the correct range for each sample from five subranges or autorange units, or uses fixed units in µS/cm or kilohm·cm
    • Features automatic conductivity calibration, allows up to five points for calibration, and uses advanced four-band cell conductivity circuitry for the most accurate conductivity measurements available\
    • Temperature correction can be programmed either off or on, with coefficients from 0 to 4.0% per °C
    Model 225
    • Displays direct ISE readouts in ppt, ppm, ppb, %, mg/mL, µg/L, moles/L, and generic ion units
    • Select one of 14 preprogrammed ions and enter up to seven standards, using fixed- or floating-point notation
    • Meter guides you through eight different known-addition or subtraction methods for indirect ion measurement
    • Dual channels provide research-grade pH and mV measurements simultaneously
    • Built-in buffer and temperature tables provide automatic compensation with the ATC probe (included in the glass-body pH/ATC probe)
    Model 250
    • Measures pH, mV, temperature, conductivity, salinity, resistivity, total dissolved solids and ion concentration
    • Automatically selects the correct range for the sample and calibrates cell constant
    • Uses up to five standards
    • Exceeds USP 23 conductivity protocol requirements
    • Displays direct ion readout in ppm, ppb, %, mg/L, µg/L, mole/L and generic ion units, with units in use displayed
    • Choose from 14 different ions with units and get eight incremental modes for indirect concentration measurements

  • Description & Specifications

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