Overview
The Noshok 40-410-300 pressure gauge (Model 3904K21) is a robust dial-indicating instrument designed for accurate pressure measurement in industrial systems. With a 0-300 PSI operating range, 1/2″ NPT bottom male connection, and 4.5″ face diameter, this gauge combines corrosion resistance with high readability. The liquid-filled design and stainless steel construction make it ideal for demanding process and utility applications.
Key Features
- 4.5″ dial face for clear, at-a-glance pressure reading
- 304 stainless steel case with 316 stainless steel internal Bourdon tube
- 0-300 PSI measurement range with bottom connection
- 1/2″ NPT male threaded connection
- Liquid-filled design for shock and vibration resistance
- Suitable for chemical processing, oil field, marine, and water/wastewater applications
Technical Specifications
- Manufacturer: Noshok, Inc.
- Model/Series: 40-410
- Model Number: 3904K21
- Pressure Range: 0–300 PSI
- Dial Face Diameter: 4.5 inches
- Connection Type: 1/2″ NPT male, bottom
- Case Material: 304 stainless steel
- Internal Material: 316 stainless steel (Bourdon tube)
- Gauge Type: Liquid-filled dry or glycerin-filled
- Typical Accuracy: ±3% or better of full scale
- Condition: New in Box
- Wetted Parts: All stainless steel construction
Typical Applications
The Noshok 40-410-300 is engineered for use in:
- Chemical processing plants and systems
- Oil field and offshore installations
- Paper mills and pulp operations
- Water and wastewater treatment facilities
- Marine and shipboard hydraulic/pneumatic systems
- Agriculture and irrigation pump monitoring
- General industrial compressor and pump pressure monitoring
Compatibility & Replacements
Compatible With
- Systems using 1/2″ NPT bottom-connection pressure gauges
- Hydraulic and pneumatic circuits rated 0–300 PSI
- Pump discharge and system monitoring applications
- Chemical injection and process control systems
- Any equipment accepting 4.5″ dial-face gauges with stainless steel construction
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Noshok 40-410 series is a replacement candidate for other 4.5″ dial, 1/2″ NPT, 0–300 PSI gauges with comparable connection geometry and mounting footprint.
Works With
- Standard 1/2″ NPT piping and fittings
- Pneumatic and hydraulic systems operating 0–300 PSI
- Industrial process control and monitoring systems
- Pump discharge and supply-line monitoring
- Compressor outlet and tank pressure measurement
