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CGP-31

Product catalog summary

Overview: The CGP-31 is a handheld carbon dioxide meter designed for measuring CO2 in both gas and liquid phase samples. It features a power-saving design, allowing for 2000 hours of continuous measurement using two AA batteries.

Key Features:

Excellent Selectivity: Utilizes a diaphragm-type glass electrode method to minimize interference from other gases, except acid and basic gases. The sensor is relatively unaffected by humidity.
Concentration Conversion: Allows switching between gas phase concentration (%(v/v)) and liquid phase concentration (mg/L).
Memory Function: Capable of saving up to 1,000 data items with auto-save intervals ranging from 1 second to 99 hours and 59 minutes.
External Device Interface: Connects to personal computers, printers, and recorders. Special software is available for data acquisition.

Specifications:

Measurement Method: Diaphragm-type glass electrode method.
Measurement Range: Liquid phase: 1.49 to 1490 mg/L; Gas phase: 0.1 to 100%.
Temperature Range: 5.0 to 50.0℃ for measurement; -5.0 to 110.0℃ for display.
Repeatability: CO2 ±5% FS or less; Temperature ±0.5℃ or less.
Response Time: Approximately 2 minutes for 90% response.
Calibration: Two-point calibration using standard CO2 solutions or gases.
External Output Ports: RS-232C and analog output ports available.
Waterproof Construction: IP 67 rating when sensor is connected and ports are masked.
Power Source: Two AA batteries or optional AC adapter.
Dimensions and Weight: 68 mm (W) x 35 mm (H) x 173 mm (L); approximately 280 g including batteries.

Measurement Principle: The device uses an electrochemical principle where CO2 gas passing through a diaphragm changes the pH of an inner solution, which is proportional to the CO2 concentration. This change is measured to determine the CO2 concentration.

Accessories and Optional Parts:

Standard accessories include a CO2 electrode, calibration cell, calibration solution powder, ion strength adjuster, protection cover, electrode stand, and holder.
Optional parts include a stirrer, external printer, analog output cable, data acquisition software, RS-232C connection cable, and AC adapter.

Contact Information: DKK-TOA Corporation, Tokyo, Japan. Tel: +81-3-3202-0225, Fax: +81-3-3202-5685.

Catalog excerpts

CGP-31 Handheld Carbon Dioxide Meter CO2 Measurement in Gas or Liquid Phase Samples Power Saving Design 2000 h hours continuous i measurement with two AA batter

Open the catalog to page 1

Measurement principle Measurement method Protection cover (with shoulder belt) Electrode stand Electrode holder AA alkaline battery (trial use) (2) Instruction manual A diaphragm-type glass electrode based on the electrochemical principle is employed for this CO2 gas sensor. According to this principle, when CO2 gas passes through the diaphragm and dissolves in the inner solution, the pH of the solution changes. Because the change of the pH is proportional to the CO2 concentration, the degree of change is measured to determine the CO2 concentration. The following figure indicates the relationship,...

Open the catalog to page 2

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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