大同工業所 List of Products and Services

The DB1000 series is an insulated barrier that does not require a standalone Type A grounding. It isolates the input, output, and power supply, preventing ground loops. It uses a slim case with a thickness of 12.5 mm. The adoption of connector terminals makes maintenance easy. It can be connected to any intrinsically safe device that meets the appropriate intrinsic safety parameters. There are five models available for contact use, solenoid use, 4-20 mA transmitters, I/P positioners, and temperature converters. 【Features】 ○ Insulated barrier ○ Isolation between input, output, and power supply, preventing ground loops ○ Easy maintenance ○ Compatible with any intrinsically safe device ○ Five models available For more details, please contact us or download the catalog.

The "DGR-A-SP Series" is an explosion-proof spot cooler that can be used in hazardous locations, specifically in Class 1 and Class 2 hazardous areas. It features an explosion-proof design with no ignition sources inside or outside the unit. The cool air outlet has a diameter of 100 mm at two locations, and the unit is equipped with a drain tank at the bottom. It is easy to install thanks to the included casters and stoppers for convenient movement and securing. 【Features】 - The refrigerant circuit has an internal pressure explosion-proof structure, while the control circuit has a pressure-resistant explosion-proof structure. - Stainless steel exterior that is resistant to rust. - Standard power cord length of 3 meters (custom lengths available as an option). - Explosion-proof performance: fd2G4 (explosion-proof grade 2 / ignition degree G4). - Certified by the Japan Industrial Safety and Health Association. For more details, please contact us or download the catalog.

The "DBO Series" is an explosion-proof dryer (general type) that can be used in hazardous locations, specifically in Class 1 and Class 2 hazardous areas. To fundamentally eliminate the causes of explosion accidents, it features an explosion-proof structure with no ignition sources inside or outside the unit. The alarm temperature can be set to any desired temperature. 【Features】 ○ Control circuit and heater have a pressure-resistant explosion-proof structure ○ Temperature display and control are digital ○ Equipped with external alarm connection terminals ○ Explosion-proof performance: d2G4 (also compatible with d2G3) (Explosion-proof grade 2/Ignition degree G3 or G4) ○ Certified by the Japan Industrial Safety and Technology Association For more details, please contact us or download the catalog.

The explosion-proof cooling and heating equipment from Daitō Industrial Co., Ltd. can be applied under the Ministry of Health, Labour and Welfare's "Regulations on Risk Assessment of Chemical Substances," which will be implemented from June 1, 2016. For consultations or inquiries about explosion-proof cooling and heating equipment to reduce the risk of fires and human disasters caused by flammable chemicals, please contact us. *We are currently offering a free comprehensive catalog! For details, please download it from the form below. [Features] ◆ Usable in Class I and Class II hazardous locations. ◆ Designed to be used without causing explosion accidents even if flammable chemicals are damaged due to earthquakes or other incidents. ◆ Used to comply with Article 280 of the Labor Safety and Health Regulations. *For specifications of explosion-proof products and the obligation for risk assessment, please contact us or download and view the catalog.

We handle "explosion-proof dryers" that are certified products by the Industrial Safety and Health Association, suitable for use in hazardous locations classified as Type 1 and Type 2. The DTI series below allows for easy temperature adjustments from the outside and is used for temperature stability testing and other applications. The DBO series is an inexpensive general-purpose dryer used for drying samples that contain hazardous chemicals. Temperature display and control are digital. 【Product Lineup】 ◎ High Precision Type 'DTI Series' ■ Control circuit has a pressure-resistant explosion-proof structure, and the heater has a special explosion-proof structure ■ Achieves high precision control through PID control ■ Equipped with over-temperature prevention function ■ Explosion-proof performance: d2G3 (explosion-proof grade 2/ignition degree G3) *The 170℃ type is D2G2 ◎ General Purpose Type 'DBO Series' ■ Control circuit and heater have a pressure-resistant explosion-proof structure ■ Explosion-proof performance: d2G4 (explosion-proof grade 2/ignition degree G3 or G4) *d2G3 is also available ■ Equipped with external alarm connection terminals *For more details, please refer to the materials. Feel free to contact us with any inquiries.

The "DGH-TC/DGH-RT series" is an explosion-proof temperature sensor that can be used in hazardous locations, specifically in Class I and Class II hazardous areas. By integrating the sensor and terminal box, it has achieved a compact design. The sensor and terminal box are constructed to be explosion-proof without becoming an ignition source. You can choose from seven types of thermocouples and five types of temperature resistance elements based on your usage conditions. The length of the sensor sheath can be designed from 10 cm to 2 m, and the diameter of the sensor sheath can be designed according to requirements, ranging from 1.6 to 8.0 mm (thermocouples) and 3.2 to 8.0 mm (temperature resistance elements). 【Features】 ○ Self-regulating heater with a safe increased safety explosion-proof structure; terminal foil with a pressure-resistant explosion-proof structure ○ Standard cable length is 3 m, but can be changed according to requirements ○ An explosion-proof terminal box (sold separately) can also be selected for cable extension ○ Explosion-proof performance: selectable from d2G1/d2G2/d2G3/d2G4 (Explosion-proof grade 2 / Ignition degree G1/G2/G3/G4) ○ Certified by the Japan Industrial Safety and Health Association For more details, please contact us or download the catalog.

The DEX series is an explosion-proof self-regulating heater that can be used in hazardous locations, specifically in Class 1 and Class 2 hazardous areas. It features a self-temperature control function that automatically adjusts the heater's heat output according to the surrounding environmental temperature, eliminating concerns about overheating. Resistors are arranged in parallel between two parallel conductors, preventing any disconnection accidents with the heater. The self-regulating heater and terminal foil are designed with an explosion-proof structure that does not become an ignition source. The cord-type heater can be designed to any requested length and is suitable for wrapping use. 【Features】 - The self-regulating heater has a safe increased explosion-proof structure, and the terminal foil has a pressure-resistant explosion-proof structure. - Up to three heaters can be connected to a single terminal box. - The direction in which the heater exits the power cable can be set arbitrarily. - Explosion-proof performance: Ex e II B T4 (Group IIB / Temperature Class T4) - Certified by the Japan Industrial Safety and Technology Association For more details, please contact us or download the catalog.

The "DGH Series" is an explosion-proof sheath heater that can be used in hazardous locations, specifically in Class 1 and Class 2 hazardous areas. The heater and controller are designed with a pressure-resistant explosion-proof structure that prevents ignition. Up to two heaters can be connected to a single controller. The standard cord length is 3 meters, but it can be designed according to requirements. There is a wide variety of lengths, outputs, and temperature ranges available, and when used in conjunction with explosion-proof temperature sensors, it allows for temperature control of the heated objects. 【Features】 - The sheath heater and controller have a pressure-resistant explosion-proof structure - Heater diameter: 16.5 mm - Overheating prevention function included - Explosion-proof performance: d2G2/d2G3/d2G4 (Explosion-proof grade 2 / Ignition degree / G2/G3/G4) - Certified by the Japan Industrial Safety and Health Association For more details, please contact us or download the catalog.

The "DGR-2N-R/F" is a large-capacity explosion-proof freezer and large-capacity explosion-proof refrigerator that can be used in hazardous locations, specifically in Class 1 and Class 2 hazardous areas. It can accommodate explosion-proof freezers and refrigerators in your desired size and can be designed with a narrower depth than the DGR-2A. All equipment inside the unit and the unit itself are explosion-proof. It is equipped with two types of safety devices for detecting temperature anomalies and pressure drops. 【Features】 ○ The refrigerant circuit has an internal pressure explosion-proof structure, and the control circuit has a pressure-resistant explosion-proof structure. ○ Equipped with a digital temperature controller on the front. ○ Adoption of forced ventilation. → Provides more uniform internal temperatures and faster cooling speeds than direct cooling types. ○ Explosion-proof performance: fd2G4 (Explosion-proof grade 2/Ignition degree G4). ○ Certified by the Japan Industrial Safety and Technology Association. Please contact us for more details.

The "DGR-A-R/F series" is a large-capacity explosion-proof freezer and large-capacity explosion-proof refrigerator that can be used in hazardous locations, specifically in Class I and Class II hazardous areas. It features an explosion-proof design that eliminates ignition sources both inside and outside the unit. The forced circulation system with an internal fan is equipped with two types of safety devices for detecting temperature anomalies and pressure drops. It can be designed to meet specific volume requirements. 【Features】 - The refrigerant circuit has an internal pressure explosion-proof structure, and the control circuit has a pressure-resistant explosion-proof structure. - Temperature display and control are digital. - Equipped with an automatic defrosting device. - Explosion-proof performance: fd2G4 (explosion-proof grade 2/ignition degree G4). - Certified by the Japan Industrial Safety and Technology Association. For more details, please contact us or download the catalog.

The "DG Series" is an explosion-proof refrigerator and freezer that can be used in hazardous locations, specifically in Class 1 and Class 2 hazardous areas. It is designed to have no ignition sources both inside and outside the unit. It features a wire condenser type without forced exhaust fans and is equipped with two types of safety devices for detecting temperature anomalies and pressure drops. 【Features】 - The refrigerant circuit has an internal pressure explosion-proof structure, and the control circuit has a pressure-resistant explosion-proof structure. - Temperature display and control are digital. - It is a two-chamber type with partitions for freezing and refrigeration. - Explosion-proof performance: fd2G4 (Explosion-proof grade 2/Ignition degree G4) - Certified by the Japan Industrial Safety and Technology Association. For more details, please contact us or download the catalog.

The "DGF Series" is a freely adjustable refrigeration and freezing unit that can be used in hazardous locations, specifically in Class 1 and Class 2 hazardous areas. It features an explosion-proof structure that has no ignition sources both inside and outside the unit. It is a wire condenser type without a forced exhaust fan and is equipped with two types of safety devices for detecting temperature anomalies and pressure drops. 【Features】 - The refrigerant circuit has an internal pressure explosion-proof structure, while the control circuit has a pressure-resistant explosion-proof structure. - Temperature display and control are digital. - It is a combined refrigeration/freezing type without partitions inside (single chamber type). - Explosion-proof performance: fd2G4 (Explosion-proof grade 2/Ignition degree G4). - Certified by the Japan Industrial Safety and Technology Association. For more details, please contact us or download the catalog.

The "DTI-RH Series" is an explosion-proof constant temperature bath with a refrigeration unit that can be used in hazardous locations, specifically Class 1 and Class 2 hazardous areas. To fundamentally eliminate the causes of explosion accidents, it features an explosion-proof structure with no ignition sources inside or outside the chamber. It achieves high-precision control through PID control. It can be designed with a customizable volume (from 245 liters) for specific requirements (DTI-3A type). 【Features】 - The refrigerant circuit has an internal pressure explosion-proof structure, while the control circuit has a pressure-resistant explosion-proof structure. - Temperature display and control are digital. - Equipped with a heater over-temperature prevention function. - Explosion-proof performance: fd2G4 (Explosion-proof grade 2/Ignition degree G4). - Certified by the Japan Industrial Safety and Technology Association. For more details, please contact us or download the catalog.

The "DTI Series" is an explosion-proof constant temperature dryer that can be used in first and second category hazardous locations. It features an explosion-proof structure that eliminates ignition sources both inside and outside the chamber to fundamentally resolve the causes of explosion accidents. It achieves high precision control through PID control. It can be designed to various volumes (250 to 1500 liters) according to requirements (DTI-3A type). The power supply can accommodate single-phase 100V and three-phase 200V. 【Features】 ○ The control circuit has a pressure-resistant explosion-proof structure, and the heater has a special explosion-proof structure. ○ Temperature display and control are digital. ○ Equipped with a heater over-temperature prevention function. ○ Explosion-proof performance: d2G3 (explosion-proof grade 2/ignition degree G3) → 170℃ type is D2G2. ○ Certified by the Japan Industrial Safety and Health Association. For more details, please contact us or download the catalog.

Hazardous locations are classified into three categories based on the frequency and duration of the generation of explosive atmospheres, according to their level of danger. Daido Kogyo's explosion-proof cooling and heating equipment can be used in Class I and Class II hazardous locations. *For the determination of hazardous locations, please refer to JIS C 60079-10 (Classification of hazardous locations for electrical equipment for use in explosive atmospheres, Part 10) from the Japanese Industrial Standards Committee JIS search. 【Classification of Hazardous Locations】 ○ Special Hazardous Locations (Zone 0) → Locations where explosive atmospheres are present continuously or for long periods under normal conditions, or where flammable gas vapors frequently reach concentrations that pose a risk of explosion. ○ Class I Hazardous Locations (Zone 1) → Locations where explosive atmospheres are likely to be generated occasionally under normal conditions. ○ Class II Hazardous Locations (Zone 2) → Locations where explosive atmospheres are less likely to be generated under normal conditions, and even if they are generated, they only persist for a short time. For more details, please contact us.

Flammable gases and vapors of flammable liquids (explosive gases) mix with air to create an explosive atmosphere, and when an ignition source comes into contact with this explosive atmosphere, an explosion occurs. If any one of the three elements of an explosion—explosive gas (flammable gas or vapor of flammable liquid), oxygen, or ignition source (spark or high temperature)—is eliminated, the explosion can be prevented. 【Explosion-Proof Electrical Equipment】 ○ Electrical equipment with a structure that prevents explosions is called "explosion-proof electrical equipment." → Electrical equipment used in hazardous locations must be "explosion-proof electrical equipment." ○ Daido Kogyo manufactures explosion-proof electrical equipment by eliminating the ignition source among the three elements of an explosion. For more details, please contact us.

The explosion-proof spot cooler can be used in hazardous areas classified as Zone 1 (Class I hazardous locations) and Zone 2 (Class II hazardous locations). It has two types of power supply: three-phase 200V and single-phase 100V. The refrigerant circuit features an internal pressure explosion-proof structure, the control circuit has a pressure-resistant explosion-proof structure, and all units are explosion-proof. It is equipped with a drain tank at the bottom of the unit. The length of the power cord can be changed as an option (standard length is 3m), and it comes with casters and stoppers for easy movement and securing of the main body. 【Features】 - Usable in Zone 1 (Class I hazardous locations) and Zone 2 (Class II hazardous locations) - No ignition sources inside or outside the unit - Two cold air outlets with a diameter of Φ100 - Equipped with a drain tank at the bottom of the unit - Exterior made of rust-resistant stainless steel For more details, please contact us or download the catalog.

The explosion-proof series heater can be used in hazardous locations, specifically in Class I and Class II hazardous areas. The heater and control unit are designed with a pressure-resistant explosion-proof structure that does not become an ignition source. A maximum of two heaters can be connected to a single control unit. The cable length (standard: 3m) can be designed according to requirements. The heater has a diameter of 16.5mm and comes in a variety of lengths, outputs, and operating temperature ranges. When used in conjunction with an explosion-proof temperature sensor, it allows for temperature control of the heated object. 【Features】 ○ Usable in Class I and Class II hazardous areas ○ Heater and control unit do not become an ignition source ○ Overheating prevention function included ○ A maximum of two heaters can be connected to a single control unit ○ Variety of lengths, outputs, and operating temperature ranges available For more details, please contact us or download the catalog.

The "DTI Series" is an explosion-proof constant temperature dryer that can be used in first and second category hazardous locations. To fundamentally eliminate the causes of explosion accidents, it features an explosion-proof structure with no ignition sources inside or outside the chamber. It achieves high precision control through PID control. It can be designed to various volumes (250 to 1500 liters) according to requirements. The power supply can be single-phase 100V or three-phase 200V. 【Features】 ○ The control circuit has a pressure-resistant explosion-proof structure, and the heater has a special explosion-proof structure. ○ Temperature display and control are digital. ○ Equipped with a heater over-temperature prevention function. ○ Explosion-proof performance: d2G3 (Explosion-proof grade 2/Ignition degree G3) → 170℃ type is D2G2. ○ Certified by the Japan Industrial Safety and Health Association. For more details, please contact us or download the catalog.

The "DTI Series" is an explosion-proof constant temperature dryer that can be used in first and second category hazardous locations. To fundamentally eliminate the causes of explosion accidents, it features an explosion-proof structure with no ignition sources inside or outside the chamber. It achieves high precision control through PID control. It can be designed to various volumes (250 to 1500 liters) according to requirements. The power supply can accommodate single-phase 100V and three-phase 200V. 【Features】 ○ The control circuit has a pressure-resistant explosion-proof structure, and the heater has a special explosion-proof structure. ○ Temperature display and control are digital. ○ Equipped with a heater over-temperature prevention function. ○ Explosion-proof performance: d2G3 (explosion-proof grade 2 / ignition degree G3) → 170℃ type is D2G2. ○ Certified by the Japan Industrial Safety and Health Association. For more details, please contact us or download the catalog.

The explosion-proof spot cooler can be used in hazardous locations, specifically in Class 1 and Class 2 hazardous areas. The power supply comes in two types: three-phase 200V and single-phase 100V. The refrigerant circuit has an internal pressure explosion-proof structure, the control circuit has a pressure-resistant explosion-proof structure, and all devices of the unit are explosion-proof, equipped with a drain tank at the bottom of the unit. The length of the power cord can be changed as an option (standard length is 3m). It is equipped with casters and stoppers for easy movement and fixation of the main unit. 【Features】 ○ Usable in Class 1 and Class 2 hazardous areas ○ No ignition sources inside or outside the device ○ Two cold air outlets with a diameter of 100mm ○ Equipped with a drain tank at the bottom of the device ○ Stainless steel exterior resistant to rust For more details, please contact us or download the catalog.

At Daito Industrial, we provide explosion-proof electrical equipment by eliminating the ignition source, one of the three elements of an explosion. The "DTI Series" is an explosion-proof constant temperature dryer that can be used in hazardous locations, specifically Class I and Class II hazardous areas. It features an explosion-proof structure with no ignition sources inside or outside the chamber to fundamentally eliminate the causes of explosion accidents. It achieves high precision control through PID control. It can be designed to accommodate various volumes (250 to 1500 liters). The power supply can be single-phase 100V or three-phase 200V. The "DTI-RH Series" is an explosion-proof constant temperature bath with a refrigeration unit that can be used in hazardous locations, specifically Class I and Class II hazardous areas. It also features an explosion-proof structure with no ignition sources inside or outside the chamber to fundamentally eliminate the causes of explosion accidents. It achieves high precision control through PID control. It can be designed to accommodate various volumes (from 245 liters) (DTI-3A type). For more details, please contact us or download the catalog.

At Daito Industrial, we have developed explosion-proof electrical equipment by eliminating the ignition source, and we offer reliable products that can be used in Class I and Class II hazardous locations, including certified products from the Japan Industrial Safety and Health Association. 【Featured Products】 □ Explosion-proof freezers and refrigerators □ Explosion-proof spot coolers □ Explosion-proof dryers and incubators Additionally, Daito Industrial will be exhibiting at the 'Pharma Lab EXPO' held at Tokyo Big Sight. Dates: July 3-5, 2019 Venue: Tokyo Big Sight Booth: Aomi Exhibition Hall A15-002 If you are interested, please download the PDF, contact us, or visit our booth at the exhibition.

We would like to introduce the "Intrinsic Safety Explosion-Proof Temperature Sensor," which has passed the explosion-proof type certification by the Japan Industrial Safety and Health Association when combined with the Insulation Type Safety Retainer (DB1051 or DB1052). It is designed to prevent the ignition of hazardous gases in areas exposed to danger, both during normal operation and in the event of an accident, by avoiding electrical sparks or high-temperature components. 【Features of the Insulation Type Safety Retainer】 ■ Made in Japan, TIIS explosion-proof certification compliant ■ No need for standalone Type A grounding ■ Insulation between input, output, and power supply prevents ground loops ■ Utilizes a slim case with a thickness of 12.5mm ■ Can be connected to any intrinsic safety device that meets the explosion-proof parameters *For more details, please refer to the PDF document or feel free to contact us.

At Daito Industrial, we have developed explosion-proof electrical equipment by eliminating the ignition source, providing products that can be used in Class I and Class II hazardous locations, as well as highly reliable products such as those certified by the (Public Corporation) Industrial Safety and Technology Association. This time, we will introduce the topic of explosion-proofing, including the question, "What is explosion-proofing in the first place?" If you are interested, please download the PDF. We will also answer questions such as "Does my factory need explosion-proof products?" so feel free to contact us if you have any concerns.