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

This is a popular portable water quality meter that allows for the measurement of "pH," "ORP," and "various ions" through electrode replacement. Its slim design makes it easy to hold, and the energy-efficient and waterproof design ensures safe use 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.

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 "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 tabletop pH and ion meter "HM-42X" is equipped with a large touch panel, offering excellent operability with a clear screen display. The display content is comprehensive, allowing for switching between vertical and horizontal orientations, and it also features a graph display that clearly shows the stability of measurement values. Additionally, maintenance information is also well-documented. ◎ You can view detailed specifications and more from the "PDF Download." If you are interested, please download the catalog to take a look.

The tabletop pH meter "HM-41X" is a basic type of pH meter that can operate on four AA alkaline batteries. The battery life is long-lasting, lasting up to approximately 2500 hours. Additionally, it can also be powered via a USB cable. ◎ You can view detailed specifications and more from the "PDF Download." If you are interested, please download the catalog to take a look.

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.

The TTT-710 is a turntable capable of automatic measurement of up to 100 samples. The electrode cleaning tank and electrode storage tank are located at the front of the device, making maintenance of piping and electrodes easier. It can perform multi-sample measurements at a constant temperature, such as measuring the electrical conductivity of pharmaceutical water in accordance with JP18 revisions, and by pre-stirring the next measurement sample, it is possible to mix the measurement solution in advance. 【Features】 ■ Automatic measurement of up to 100 samples (100 samples is a manufacturer option) ■ Excellent maintainability ■ A variety of electrode cleaning modes available ■ Turntable with a constant temperature water bath available (manufacturer option) ■ Next sample stirring function included (manufacturer option) ■ Analysis equipment installation stand designed for space-saving (optional) *For more details, please refer to the PDF document or feel free to contact us.

The "HDM-135A type (2-wire) / HDM-136A (4-wire)" is a compact and robust pH meter converter (transmitter) designed for on-site installation, featuring simple functions and easy operation in an aluminum case. It is available in a 2-wire (DC 24V power supply) and a 4-wire (AC free power supply) configuration, with a transmission output of DC 4-20mA. If normal standard liquid calibration cannot be performed, it will display messages for zero or slope abnormalities, or instability issues. 【Features】 ■ Changeable pH transmission output range ■ One-touch automatic calibration ■ Automatic determination of pH electrode condition ■ pH measurement value shift ■ Glass electrode crack detection *For more details, please refer to the PDF materials or feel free to contact us.

We introduce the features of the pH meter for processes (industrial use) from Toa DKK. <Adoption of Glass pH Electrode> pH is continuously measured using the glass electrode method, allowing for constant control or monitoring of pH. <Conversion of Water Quality Meter Measurement Range to Current Signal for Transmission> It has output for measurement value signals (DC 4-20mA) and control/alarm (ON-OFF contacts). <Ruggedness> Determining the material according to the installation location is crucial. The converter uses robust materials, and the detector holder can be selected based on the customer's site requirements. <Composed of More Than Three Models> The system is composed of more than three models, including the converter (display), detector (electrode holder), and auxiliary equipment, with automatic cleaners added in wastewater treatment facilities. It is important to select the most suitable models for each site and enhance the system (see image). Toa DKK offers a diverse lineup including converters (displays), detectors (electrode holders), cleaners, and auxiliary equipment. *For more details, please refer to the PDF document or feel free to contact us.

The "HBM-160B/162B model" is a robust field-mounted pH/ORP converter made of aluminum die-cast with a 4-wire (AC-free power supply) design. It is equipped with a DC 4-20mA transmission output for pH/ORP values and water temperature, as well as a 2-point adjustment (upper and lower limit alarm contact) output. All operations, including calibration, can be performed using the 10 waterproof sheet keys on the front without opening the door. 【Features】 ■ Standard liquid calibration (check) with one-touch automatic stability determination ■ Stable calibration without individual differences ■ Automatic determination of electrode characteristics with message display ■ Alarm (adjustment) output with adjustable sensitivity settings for upper and lower limit ON-OFF operation ■ Display unit with backlight *For more details, please refer to the PDF document or feel free to contact us.

The "HBM-100B/102B" is a panel-mounted pH/ORP controller that conforms to the compact DIN standard of 96×96mm. It comes standard with two alarm (control) outputs and a DC 4-20mA transmission output. The standard liquid calibration (check) features one-touch automatic stability determination, allowing for stable calibration without individual differences. 【Features】 ■ Automatically determines the quality of electrode characteristics and displays a message ■ Alarm (control) output includes adjustable sensitivity settings for upper and lower limit ON-OFF operation ■ The display unit is equipped with a backlight *For more details, please refer to the PDF document or feel free to contact us.

The "HC-7□ Series" is an industrial immersion-type pH/ORP meter detector used for pH/ORP measurement in open channels and tanks. It incorporates electrodes into the electrode holder, allowing for the storage of a large amount of KCl internal solution within the holder. To accommodate a wide range of applications, from wastewater treatment facilities to processes with harsh measurement conditions, we offer various types of contact materials and combination electrodes. 【Features】 ■ Maintains comparative potential stably over a long period ■ Standardized various pressurized detectors for more reliable measurements ■ Capable of storing a large amount of KCl internal solution within the electrode holder *For more details, please refer to the PDF document or feel free to contact us.

The "HC-8□ Series" is a flow-type detector used for pH/ORP measurement in closed loops such as piping and sealed tanks, incorporating electrodes into an electrode holder. It is available in two shapes: a case (chamber) type that connects to a bypass line via a flange, and an insertion type that connects to the side of piping or tanks using screws or flanges. To accommodate various measurement conditions, there are many options for liquid contact materials and connection standards, as well as a wide variety of combination electrodes. 【Features】 - Widely usable from wastewater and sewage treatment facilities to boiler systems and general process control equipment. - Offers internal liquid pressurization for cases with process pressure and internal liquid head pressure (sampling type) for cases without process pressure (atmospheric pressure). - Model selection can be made based on the connection method to the process line and the measurement conditions such as pressure, temperature, and characteristics of the sample water. *For more details, please refer to the PDF materials or feel free to contact us.

Introducing the immersion-type pH/ORP detector with cleaning function, the "□HC-7 Series." The pH and ORP electrodes are equipped with glass sensors or platinum sensors, with the sensing components such as the liquid junction and temperature compensation sensor positioned downward. It allows for the selection of a more effective cleaning method suitable for the installation site. Additionally, we offer the immersion-type pH/ORP electrode holder combined with an ultrasonic cleaner, the "UHC-7D type" ultrasonic cleaning immersion detector. 【□HC-7 Series Various Cleaning Methods】 ■ Ultrasonic cleaning method ■ Brush cleaning method ■ Water jet cleaning method ■ Pulse air jet cleaning method ■ Chemical cleaning method ■ Lift-up jet cleaning method *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce the ultrasonic cleaning liquid-type detector "UHC-8D" and the water jet cleaning liquid-type detector "JHC-8C." The "UHC-8D" achieves cleaning effects through the cavitation effect generated by efficiently irradiating ultrasonic waves onto the electrode sensing part. The "JHC-8C," on the other hand, intermittently cleans the electrode sensing part using the pressure of water jet injection, preventing dirt adhesion. The control unit's transparent window includes lamps that indicate cleaning in progress and cleaning notifications. 【Features of UHC-8D】 ■ Ultrasonic cleaning liquid-type detector ■ Cleaning effects achieved through cavitation ■ Adopts burst oscillation method (intermittent irradiation) ■ The electrode holder is available in two types: an internal liquid pressurized type for process pressures below 0.1 MPa and an atmospheric pressure sampling type with internal liquid head pressure. *For more details, please refer to the PDF document or feel free to contact us.

The MAC-1600 model is a field-installed pH meter that automates the cleaning of electrodes and two-point calibration using JIS standard solutions. It enables reliable pH measurement over long periods while reducing the burden of maintenance tasks. With a two-channel measurement function that controls two detection units with a single converter, it can be used for pH control or monitoring in various plant facilities. Features: - Reduction of maintenance workload: Periodic cleaning of electrodes and calibration with standard solutions helps reduce maintenance efforts. - Highly reliable pH measurement: Automatic two-point calibration using JIS standard solutions pH 7 and pH 4 or pH 9 allows for stable continuous pH monitoring over long periods. - Supports two-channel measurement (optional): Simultaneous measurement with two connected detection units (including liquid delivery control) enables measurement without missing data during calibration and cleaning. - High cleaning effectiveness with a lift-up type air jet cleaning. - Appropriate and practical self-diagnosis messages: In case of calibration failure or electrode damage, a "meter failure" signal is output collectively. *For more details, please refer to the PDF document or feel free to contact us.

When measuring pH, if you calibrate the pH meter with a pH standard solution whose pH value is already known, you can directly determine the pH value from the electromotive force generated in response to the pH. This document provides detailed information about pH, including pH measurement methods, glass electrodes and reference electrodes, as well as the types and characteristics of pH electrodes. Additionally, we also introduce the oxidation-reduction potential, so please take a look at that as well. 【Contents】 <About pH> ■ pH measurement methods ■ Glass electrodes and reference electrodes ■ Temperature compensation electrodes ■ pH combination electrodes ■ pH standard solutions ■ Types and characteristics of pH 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!

At Toa DKK, we publish various helpful product videos on our YouTube channel and website. From the tabletop water quality meter X series, we have released helpful videos for users of the pH meter. Target models: HM-42X MM-43X "How do you calibrate pH?" When measuring pH, if you calibrate the pH meter with a pH standard solution of which the pH value is already known, you can directly know the pH value from the electromotive force generated in response to the pH. 【Keywords】 Zero calibration, span calibration, two-point calibration, pH standard solution, pH measurement