東亜ディーケーケー List of Products and Services

This is a multi-type portable water quality meter that allows for the measurement of "pH," "ORP," "electrical conductivity," and "dissolved oxygen" through probe replacement. Available in a 2-channel type MM-42DP and a 1-channel type MM-41DP! The measurement of dissolved oxygen adopts an "optical method"! With a waterproof structure and backlight, it can be safely used in the field. ◎ You can view detailed specifications and more from the "PDF Download." If you are interested, please download the catalog to take a look. Additionally, you can download materials that clearly explain the measurement methods for pH, electrical conductivity, and dissolved oxygen.

The tabletop multi-parameter water quality meter "MM-43X" is a desktop water quality meter capable of measuring pH, ORP, electrical conductivity, resistivity, dissolved oxygen, ions, and more. It can connect two sensors and display two parameters simultaneously. Additionally, it features a large touch panel with an easy-to-read screen display, enhancing usability. ◎ You can view detailed specifications and more from the "PDF Download." If you are interested, please download the catalog for more information.

This is a portable meter compatible with field measurements that can measure "dissolved oxygen," "pH," "ORP," "electrical conductivity," and "ions" through probe replacement. It features intuitive operation with an illustrated step-by-step guide and supports Japanese display. Additionally, it has smooth and convenient data management and output functions, allowing all data logs to be output to a PC or USB memory via USB connection. The dissolved oxygen measurement adopts a fluorescent method (LDO), making maintenance easy. 【Features】 ■ Supports water quality measurement in combination with digital sensor IntelliCAL probes ■ The multi-meter "HQ4000" series is equipped with a color display ■ Powered by a rechargeable lithium-ion battery, with charging possible via a dedicated AC adapter or USB connection ■ Equipped with data sorting and filtering functions *For more details, please refer to the PDF document or feel free to contact us.

The "WQC-40" is a portable water quality meter that supports various measurements including pH, electrical conductivity, salinity, TDS (total dissolved solids), seawater specific gravity, turbidity, temperature, dissolved oxygen, ORP (oxidation-reduction potential), ions, and water depth. The sensor module in the measurement section can simultaneously measure up to 9 items with a single unit and is capable of measuring water depths up to 100 meters, making it useful for environmental monitoring of rivers, lakes, and dams, as well as for water quality management in factories and aquaculture sites. It has a diameter of 45mm, allowing for easy insertion into drilling investigation pipes and other equipment. By connecting the optional Modbus power box to a general-purpose gateway, a water quality monitoring system can also be established. 【Measurement Items】 Standard: pH, electrical conductivity, salinity, TDS (total dissolved solids), seawater specific gravity, turbidity, temperature Optional: dissolved oxygen, ORP (oxidation-reduction potential), water depth, ions *Ion electrodes can be selected from 6 types (fluoride, chloride, nitrate, calcium, potassium, ammonium ions) *For detailed information such as measurement ranges, please refer to the documentation. Feel free to contact us with any inquiries.

The "WQC-30" is a high-performance integrated sensor that can simultaneously measure up to 6 parameters, making it a simple portable multiparameter water quality meter. It features a memory function for 200 data points. Automatic memory at regular intervals is also possible, making it effective for simple monitoring. Additionally, with its energy-saving design, it can measure continuously for approximately 70 hours using two AA alkaline batteries. This achieves about a 90% reduction in power consumption compared to our conventional products. 【Features】 ■ High-performance integrated sensor for simultaneous measurement of up to 6 parameters ■ Improved reliability in low-concentration turbidity range ■ Memory function for 200 data points ■ Energy-saving design ■ Continuous measurement for approximately 70 hours using two AA alkaline batteries *For more details, please refer to the PDF document or feel free to contact us.

The "DO-32A" is a low-concentration portable dissolved oxygen meter that responds quickly and measures with high precision in the μg/L (ppb) range, also supporting simple continuous measurements. It accurately measures trace amounts of dissolved oxygen in water supply systems at thermal and nuclear power plants, metal material corrosion testing plants, semiconductor manufacturing equipment, etc., with high response and precision. The operability and functionality have been significantly improved based on the conventional DO-30A, reflecting the opinions and requests of related customers throughout. 【Features】 ■ Wide dynamic range / auto range ■ Fast response with long lifespan ■ Easy calibration ■ Temperature measurement function ■ Compact design for easy maintenance *For more details, please refer to the PDF materials or feel free to contact us.

The ODM-135A model (2-wire type) / ODM-136A model (4-wire type) is a compact and robust aluminum-cased dissolved oxygen meter converter (transmitter) designed for simple operation and field installation. It can be used for continuous measurement and control of dissolved oxygen concentration in wastewater and sewage treatment plants, as well as in industrial wastewater treatment facilities. There are 2-wire (DC 24V power supply) and 4-wire (AC-free power supply) versions available. 【Features】 ■ Changeable transmission output (measurement) range ■ Automatic determination of electrode condition during calibration ■ Easy operation ■ Transmission output value holds during maintenance ■ Measurement value adjustment *For more details, please refer to the PDF document or feel free to contact us.

The "OBM-162A type" is a robust aluminum die-cast, 4-wire (AC-free power supply) field-mounted dissolved oxygen meter converter. It is equipped with a transmission output of DC 4-20mA for two circuits (including water temperature) and two-point adjustable output. If normal calibration cannot be performed, it displays messages such as zero or slope abnormalities or response failures, and all operations can be performed using the ten waterproof sheet keys on the front without opening the door. 【Features】 ■ Compact aluminum die-cast case ■ Multifunctional field-mounted dissolved oxygen meter ■ Diaphragm rupture detection function (according to main unit specification code) ■ Two-point adjustable output, transmission output for two circuits including water temperature, RS-232C output (optional) ■ One-touch automatic calibration, diverse self-diagnosis functions *For more details, please refer to the PDF document or feel free to contact us.

The "OBM-102A model" is a compact and lightweight panel-mounted dissolved oxygen meter for general concentration measurement. It is equipped with a DC 4-20mA transmission output and a two-point adjustment (upper and lower limit alarm a contact) output, and it operates on an AC-free power supply. The combination detector uses a polarographic dissolved oxygen electrode, which can automatically return to measurement mode after two hours in maintenance mode. 【Features】 ■ Compact DIN96 size ■ Panel-mounted dissolved oxygen meter ■ Two-point adjustment output, 4-20mA transmission output, RS-232C output (optional) ■ One-touch automatic calibration and various self-diagnostic functions *For more details, please refer to the PDF document or feel free to contact us.

The "□OC Series" is a dissolved oxygen (DO) detector for drainage, sewage, and wastewater treatment facilities, as well as for general environmental water measurement. It incorporates a diaphragm polarographic electrode into the electrode holder, and is available in various types including immersion type, drop-in type, flow-through type, float type, with pulse air jet cleaning, and with water jet cleaning. 【OC Series Lineup】 ■OC-711 ■OC-950 ■OC-991 ■NOC-814 ■NOC-815 *For more details, please refer to the PDF document or feel free to contact us.

The "OBM-100H model" is a compact and lightweight panel-mounted dissolved oxygen meter designed for low concentration measurements. It is equipped with a transmission output of DC 4-20mA and a two-point adjustment (upper and lower limit alarm a contact) output, and it operates on an AC-free power supply. Even when measurement is stopped (power OFF), it supplies voltage to the electrodes via an internal battery, allowing for quick response upon resuming measurements. 【Features】 ■ Compact DIN96 size, panel-mounted low concentration dissolved oxygen meter ■ Two-point adjustment output, 4-20mA transmission output, RS-232C output (optional) ■ One-touch automatic calibration and a variety of self-diagnosis functions ■ Equipped with a burnout function to prevent transmission output from exceeding limits *For more details, please refer to the PDF materials or feel free to contact us.

The "ODM-110A model" is a compact and robust dissolved oxygen meter converter for low concentration, designed for field installation, featuring a simple operation with a 4-wire system. In the event of abnormalities such as disconnection or short circuit of the temperature measurement resistance, hardware malfunctions, or data anomalies, it is equipped with a burnout function that drives the transmission output to the upper or lower limit to signal the abnormality. After 2 hours in maintenance mode, it automatically returns to measurement mode. 【Features】 ■ Compact and robust aluminum case ■ Simple operation for field-installed low concentration dissolved oxygen meter ■ Simplified calibration process, automatic judgment of electrode characteristics ■ Adjustable transmission output range ■ Self-diagnosis function in case of failure (burnout output) *For more details, please refer to the PDF document or feel free to contact us.

The "LDO2" fluorescent dissolved oxygen meter is a dissolved oxygen meter that employs an optical sensor, achieving both stability and reliability through an innovative measurement principle that differs from traditional membrane types. By controlling the emission of blue and red LEDs inside the detector, it accurately detects fluorescent reactions corresponding to oxygen concentration. Optical zero adjustment is also performed automatically, ensuring stable measurements over long periods. 【Features】 ■ No membrane required: Structure without electrolyte or anodes/cathodes eliminates the need for part replacement. ■ Significantly reduces maintenance effort: Only requires sensor cap replacement every two years. ■ Long-term stability maintained through optical zero adjustment. ■ Minimal impact from interfering substances or flow rate changes, allowing stable operation in a wide range of water quality environments. ■ Simultaneous measurement with 2 channels: Two detectors can be connected to the SC4500 converter. *For more details, please refer to the PDF document or feel free to contact us.

Dissolved oxygen refers to the amount of oxygen (mg/L) that is dissolved in water. The amount that dissolves in water increases with lower water temperatures and higher pressures. Under conditions of 1 atmosphere and 25°C, it is estimated that about 8 mg/L (saturated dissolved oxygen amount) of oxygen can dissolve. This document provides detailed information about dissolved oxygen sensors, non-aqueous solvent electrodes, and other information related to dissolved oxygen. Please take a moment to read it. [Contents] ■ About dissolved oxygen ■ Dissolved oxygen sensors ・ Membrane electrode method ・ Optical sensor method ■ For BOD measurement ■ Non-aqueous solvent electrodes *For more details, please refer to the PDF document or feel free to contact us.

<Currently featuring the following videos!> ● TOA DKK Company Introduction (Japanese version and English version) ● Portable Multi-Water Quality Meter Product Introduction ● Portable Tabletop Water Quality Meter Product Introduction ● HACH Spectrophotometer Product Introduction ● HACH Turbidimeter Product Introduction We also have various videos on measurement operations, calibration procedures, maintenance, and more for each product! We plan to add more diverse content in the future. Please take a look and consider subscribing to our channel!