Automatic Titrator

Model No: COM-28/28S

Color Touch Panel in a Compact Body

  • 4.3 inch color LCD touch panel
  • Titration curve display
  • Economy purge function
  • Space saving
  • Save data to USB memory

Although it is reasonably priced, it has a variety of functions!
It is also possible to upgrade from COM-28 to COM-28S for a fee, allowing you to meet future needs!

Technical Specification

Titration Methods:

  • Potentiometric titration
  • Photometric titration (using M-28 unit for photometric titration)

Titration Modes:

  • Learn titration
  • Inflection-point detection
  • Set-point detection
  • Set point / Inflection-point detection
  • Cross-point (F, B) detection
  • pH-Stat
  • pH measurement
  • Dispensing
  • Calculation

Measuring Range:

  • pH: 0.00 – 14.00 pH
  • mV: -2000 to +2000 mV
  • Temperature: 0 – 100°C (Automatic / Manual temperature compensation)

Endpoint Detection Mode: Auto-detection using second derivative, Set-point detection, Cross-point detection

Number of Endpoints Detected: Up to 5 endpoints with a Learn Titration file. Condition connection: Maximum 3 endpoints.

Display: 4.3-inch color LCD touch panel

Displayed Content:

  • Titration conditions
  • Data per drip
  • Titration results
  • Titration curve
  • Differential curve
  • List of titration results
  • Statistics calculation results
  • Condition settings display

Memory Data Capacity:

  • Built-in memory: 100 data points
  • USB Flash Memory (256 MB or higher): Approx. 9,900 data points

Settings Input Method: Key touch input

Sample Data: Sample No. (2 digits), ID Code (16 alphanumeric characters)

Master File: 51 files

Conditions File: 51 files

Number of Linked Condition Files: 5 files

Titration Control Mode Files:

  • Standard Files: 51
  • Manufacturer Settings Modes
  • Blank Modes
  • User Setting Modes

Constant Files: 51 files

  • K, L (Constants)
  • F (Factors)
  • M or N (Molarity or Normality)
  • B (Blank mL)
  • S (Sample Size)

Sample Files: 50 files

Auto Input Function: Automatically sets titration results to constant parameters such as blank values and factors. Designated condition files can be used for automatic input.

Calculation Functions:

  • Concentration calculation
  • Statistics calculations
  • Automatic pH compensation

Branching Function: After measuring potential prior to titration, branching into up to 2 condition files.

Smoothing Function: Yes

Number of Electrode Connectors:

  • Potentiometric: 2 channels (BNC × 2, φ2 pin conversion plug included)
  • Thermistor: 1 channel (Compatible with TE-405 electrode)

Buret: 1 built-in buret, expandable to 2 additional burets (optional)

Buret Capacity:

  • Standard: 20 mL transparent syringe with UV-shield protective cover
  • Optional: 10 mL and 50 mL syringes available separately

Minimum Dispensing Volume: 0.005 mL (with 20 mL syringe)

Buret Accuracy:

  • Relative Accuracy: ±0.1% or less (full-capacity discharge, factory settings, new syringe)
  • Repeat Accuracy: ≤0.01 mL (full-capacity discharge from 20 mL syringe, n=6 standard deviation)

GLP-Compliant Functions:

  • Buret precision check
  • Electrode check
  • Buret use frequency (display/print)
  • Electrode maintenance (display/print)
  • Reagent level display and alarm

Stirrer: Magnetic stirrer with 1 stirring bar included

External Input / Output:

  • RS-232C: 2 ports (1 for balance, 1 for computer or printer)
  • USB Flash Memory Port: 1

Power Supply Requirements:

  • AC Inlet: IEC60320 C14
  • DC Output Voltage: 24 V DC
  • DC Output Capacity: 60 W or higher (less than 100 W)
  • Input Voltage: AC 90–240 V
  • Input Frequency: 45–66 Hz
  • Polarity: Center Positive
  • DC Plug: Inner Ø 2.1 mm, Outer Ø 5.5 mm, Length 9.5 mm
  • Certification: CE Marking
  • AC Cord: Compatible with adapter specifications

Dimensions / Weight: 255 (W) × 290 (D) × 430 (H) mm / Approx. 6.0 kg

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Automatic Titrator