70D Series

Our 70D Series are fixed gas detectors developed for the semiconductor and research industries. 70D Series gas detectors are the perfect tool for monitoring gas leaks in facilities where many different kinds of gases are used.

70D Series

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Over 260 gas sensors available

New technological advancements require the use of different gases during the manufacturing process. We have continued to develop new gas sensors in response to feedback from our users themselves. Our GD-70D now offers a lineup of over 260 different sensors, including anti-gas interference sensors, minimizing the impact of interference from alcohol and other substances. If you do not find the target gases or detection range you need from among our lineup of sensors, we can perform a sensitivity analysis using current available sensors and provide sensors adapted specifically to meet your needs.

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No. 1 in the Japanese semiconductor industry

Our GD-70D Series is the best-selling gas detector in the Japanese semiconductor industry, testament to its unbeatable reliability and performance. Trusted also by the semiconductor industry and research facilities worldwide, this best-selling product boasts some 100,000 units in annual sales. Proven to meet the demanding performance needs of the global semiconductor and research industries, you can trust our GD-70D Series for your gas leak management needs.

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Easy maintenance

Maintenance on the GD-70D is simple. When the time comes to replace parts, simply open the front cover on the main unit - no special tools or equipment required. Its self-diagnostic and automatic adjustment functions eliminate the need for daily inspection. Maintenance services are also widely available from our many distributors located in over 80 countries worldwide.

Product Name	GD-70D	TP-70D	TP-70DGII
Product Image
Product Subtitle	Fixed Gas Detector	Smart-Type Gas Detector Head	Smart-Type Gas Detector Head
Product Type	Fixed Gas Detector	Fixed Gas Detector	Fixed Gas Detector
Industries	Infrastructure, Semiconductors, Sustainable Energy	Semiconductors	Semiconductors
Use Purpose	Safety management	Safety management	Safety management
Single/Multi	Single	Single	Single
Certification	CE Mark		CE Mark
Detectable Gas	Lineup of More Than 260 sensors	Lineup of More Than 100 Sensors	C4F6,C5F8,COS
Detection Range	N/A	N/A	0 to 5 ppm (C4F6)(C5F8) 0 to 15 ppm (COS)
Principle of Detection	New Ceramic Catalytic Method, Semi-Conductor Method, Hot Wire Type Semi-Conductor Method, Non-Dispersive Infrared Method, Potentiostatic Electrolysis Method, Membrane Type Galvanic Cell Method, Pyrolysis-Particle Detection Method	Catalytic Combustion Method, Semi-Conductor Method, Non-Dispersive Infrared Method, Potentiostatic Electrolysis Method, Membrane Type Galvanic Cell Method	Potentiostatic Electrolysis Method
Sampling Method	Internal Sample Pump	Internal Sample Pump	Internal Sample Pump
Ingress Proof Rating	N/A	N/A	N/A
Dimensions	Approx. 70 (W) x 120 (H) x 145 (D) mm	Approx. 160 (W) x 210 (H) x 260 (D) mm (excluding projections)	Approx. 180 (W) x 225 (H) x 285 (D) mm (excluding projections)
Weight	Approx. 0.9 kg	Approx. 4.3 kg	Approx. 6.0 kg
Remarks	Self-diagnostic Function, Automatic Flow Rate Adjustment	Transportable, Automatic Flow Rate Adjustment	Transportable, Automatic Flow Rate Adjustment
Power Source	24 VDC ±10 %, POE	100 V to 240 VAC ±10 %	100 V to 240 VAC ±10%
Continuous Operation	N/A	N/A	N/A
Operating Temperature Range	0 to 40 ℃ (no sudden changes)	0℃ to 40 ℃ (by the installed sensor unit, no sudden changes)	20℃ to 40℃ (no sudden changes)
Operating Humidity Range	30 to 70 %RH (no condensation)	30 to 70 %RH (no condensation)	40 to 70 %RH (no condensation)
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Why Customers Choose Us

Since our beginnings in 1939, Riken Keiki has continued to lead the way in gas detection technology, laying the foundations that support our modern society.

Discover why customers continue to choose Riken Keiki, the global standard in gas detection equipment.