The Nagano Keiki GC30 is an ultra-compact digital differential pressure gauge designed for precise measurement in dry air and nitrogen gas environments. Its 30x30mm size and silicon capacitive (SC) sensor enable high-sensitivity readings from 50Pa, making it ideal for clean room pressure monitoring, HVAC systems, and industrial automation. The gauge provides simultaneous pressure indication, switch output, and analog output for seamless integration.
The Nagano Keiki GC30 digital differential pressure gauge is engineered for applications requiring fine differential pressure measurement in confined spaces. It employs a silicon capacitive (SC) sensor with minimal moving parts, ensuring reliable and highly sensitive readings. The gauge features a 3½-digit LED display with 10mm characters, offering clear visibility of differential pressures ranging from 50Pa to ±5kPa. Its compact 30x30mm enclosure is designed for wall mounting, making it suitable for limited-space installations in industrial and cleanroom environments.
The GC30 provides versatile output options, including a standard 1-5V DC analog output and a 2-point comparator switch output (NPN or PNP open collector). The device supports manual configuration via a front-panel keypad, allowing users to adjust settings such as zero point, scaling, filter time constants (none, 25ms, 250ms, 2.5s, 5s, 10s), and hysteresis or window comparator modes. Additional functionalities include loop check, peak and bottom hold display, and key lock to prevent accidental operation. Wetted parts are constructed from silicon, glass, silicone, and PC/ABS, ensuring compatibility with dry air and nitrogen gas.
The GC30 is widely used in clean room internal pressure measurement, where maintaining precise differential pressures is critical for contamination control in semiconductor manufacturing and pharmaceutical environments. In HVAC systems, it enables efficient filter clogging detection and exhaust fan rotation speed control, ensuring optimal air quality and energy savings. The gauge is also employed in N2 pressure adjustment and management for industrial processes, as well as in gas flow rate detection using Pitot tubes and differential pressure control for flowmeter applications. Its ultra-compact 30x30mm size and robust silicon capacitive sensor make it ideal for installations where space is limited, while its high sensitivity ensures accurate readings even at low pressures starting from 50Pa.
The GC30 series includes configurable variants such as the GC30-101 (differential pressure display) and GC30-111 (square root calculation display for air velocity or flow rate). Both models share the same ultra-compact design, core functionalities, and compatibility with dry air and nitrogen gas. Optional accessories include a panel adapter and L-shaped mounting bracket, while the XRH option provides a 9-point NIST traceable calibration certificate for enhanced accuracy verification.
For applications requiring alternative differential pressure ranges or form factors, related models in the Nagano Keiki portfolio include the GC31, GC81, and GC64, each offering tailored specifications for specific industrial and cleanroom requirements.
We can source and supply the Nagano Keiki GC30 digital differential pressure gauge and related parts across major industrial regions, ports, and shipbuilding hubs worldwide, including:
Nagano Keiki stands as a global leader in the field of pressure measurement technology, providing an extensive portfolio of high-performance instruments essential for industrial precision and safety. With a legacy of over a century, the company is renowned for manufacturing durable and highly accurate pressure gauges, pressure sensors, and pressure transmitters. These critical components are expertly engineered to perform in the most demanding environments across a range of key sectors. In the marine industry, Nagano Keiki’s instruments are trusted for their ability to withstand the rigors of the sea, providing vital, real-time insights for vessel monitoring systems to ensure safe and efficient maritime operations. Within the oil and gas sector, their products are indispensable for high-pressure applications and the measurement of high-temperature or corrosive fluids, playing a crucial role in the processes of oil and natural gas extraction, storage, and transportation. Furthermore, in the petrochemical industry, their specialized and explosion-proof solutions are utilized in refineries and processing plants to control and monitor critical processes, where precision measurement is paramount for safety and operational integrity. By integrating advanced technology with robust design, Nagano Keiki’s instruments provide the reliability and performance required for these essential industries.
Nagano Keiki offers a diverse range of pressure gauges designed to provide accurate and reliable pressure indication in various industrial and specialized applications. The unwavering performance of these instruments is ensured by their robust stainless-steel construction and key features like glycerine-filled interiors, which provide superior vibration and pulsation resistance for a long-term service life in harsh environments.
This category includes the A-Series, with models such as A20, A10, A15, AA, AC, AE, AG, and AJ. These are standard bourdon tube pressure gauges compliant with JIS B 7505-1: 2015. They have a simple construction that makes them easy to handle and are applicable to a wide variety of industrial applications.
This category includes the B-Series, with models such as BA, BC, BE, BG, BJ, BL and BA10, BC10, BE10, BG10, BJ10, BL10, BA12, BC12, BE12, BG12, BJ12, BL12, BA15, BC15, BE15, BG15, BJ15, BL15. These are bourdon tube pressure gauges made in accordance with the JIS B 7505-1 standard and are engineered for more demanding industrial environments.
The D and DG-Series, with models such as DG12, DG16, DG17, DG26, DG55, DG56, DG57, DG58, DG70, DG80, DG85, DG87, DG93, DG94, DG95, DG96, DG97, and DG98, are designed for measuring the pressure difference between two points. They can also be used for measuring tank liquid levels or combined with an orifice to measure flow in a pipeline.
The GC-Series provides high-accuracy electronic readings. This category includes models like GC15, GC16, GC31, GC61, GC62, GC66, GC67, and GC91, which are useful for applications requiring a clear, digital display of pressure values.
The GV-Series is filled with liquid (glycerin) to protect the internal moving parts from wear caused by vibration. This makes them suitable for use in environments with constant vibration, extending the life of the gauge. This category also includes the Compact Glycerin Pressure Gauge, and the GV95 and GV97 models for smaller applications.
Pressure Sensors & Transmitters
These products convert pressure into an electrical signal, enabling precise monitoring and automated control in complex systems. Their unparalleled accuracy is achieved through advanced sensing technology like Bourdon tube and Semiconductor Strain Gauge (SS sensor) technologies. The instruments, including models with non-liquid filled technology, are tailored for specific requirements like high-temperature and high-viscosity applications, ensuring clean and safe operation.
Pressure Switches
Nagano Keiki’s pressure switches are essential for safety and control systems, automatically triggering an action when a set pressure threshold is met. These products are a professional standard of safety, with many models holding ATEX and IECEx certifications for use in explosion-proof environments and critical applications like refineries.
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