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Explosion Flame Proof Temperature Sensors | Okazaki Manufacturing

Updated: Aug 16

Welcome to Nichiboku's industrial Blog

Introduction

In environments where safety and accuracy are non-negotiable, Okazaki Manufacturing presents advanced Explosion Flame Proof Temperature Sensors—specifically the Aeropak® models (T99 / T409) and Resiopak® models (R99 / R409). These sensors offer robust, certified performance for industries managing flammable atmospheres, hydrogen applications, and stringent safety standards.


Silver temperature sensor with text "Explosion/Flame Proof Temperature Sensors." OKAZAKI logo, basic types listed. Gray background.
Explosion and flame-proof temperature sensors by Okazaki Manufacturing, featuring Aeropak® and Resiopak® models for enhanced safety in extreme environments.

Intrinsically Safe Design with Industry-wide Certification

Okazaki’s explosion/flame proof temperature sensors are engineered and certified to comply with global safety standards including TIIS (Japan), ATEX (Europe), FM (USA), IECEx, NEPSI, KOSHA, TR CU, PESO, OSHA, and more. With high ingress protection (IP66, NEMA 4 & 4X), these products ensure reliable performance under extreme and hazardous conditions.

Available models include:

  • Aeropak® Thermocouples – AEROPAK® (T99 / T409)

  • Resiopak® Resistance Thermometer Sensors – RESIOPAK® (R99 / R409)

High Durability & Safety Features

Robust Materials and Construction

  • Sensor bodies are crafted from durable materials like A.D.C.12, SCS14, or CF8M (316 stainless steel equivalent), with optional coatings including acrylic and epoxy resins.

  • Certified ratings: IP66 for Japanese and international use, NEMA 4/4X for North America. Type 4 & 4X ratings are also available.

Secure Connection and Adaptability

  • Integration with pressure-proof packing type connectors is mandatory for Japanese-certified models and must align with cable specifications.

  • Connection threads are versatile: G1/2, G3/4, NPT1/2, NPT3/4, M20, M24, M25, ensuring compatibility with multiple systems.

Flexible Certification for Global Distribution

  • Globally accepted certifications eliminate redundant safety testing in importing countries, facilitating smoother delivery and integration.

  • Ambient temperature limits vary by region (e.g., Japan: −20 °C to +55 °C; Europe/USA: −50 °C to +75 °C).

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Key Applications & Benefits: Explosion Flame Proof Temperature Sensors

Okazaki’s explosion-proof sensors are ideal for industries such as:

  • Hydrogen infrastructure and fuel-cell facilities, where leak risk is critical

  • Processing plants: oil, gas, petrochemical and chemical refineries

  • Mining and hazardous zones, where precision meets combustibility prevention

Their certified reliability and global approvals make them a seamless choice for mission-critical environments.

Strategic Integration for Tech-forward Industries

Okazaki’s explosion/flame proof sensors embody:

  • Global Safety Compliance – Built to conform to international standards

  • Rugged Construction – Tailored to endure high-pressure, extreme-temperature environments

  • Adaptable Design – Compatible with multiple connection standards and operating conditions

  • Others Okazaki Products (here)

Request a Safe & High-Performance Sensor Solution

Partner with Nichiboku Ltd to integrate trusted, certified temperature sensors into your industrial systems:

  • Contact our team for specifications



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