Overview
The Noshok 25-200-100-inH2O is a precision low-pressure diaphragm gauge engineered for sensitive pressure and vacuum measurement in pneumatic and hydraulic systems. This 200 Series gauge delivers accurate readings across the 0–100 inH2O range, making it ideal for compressed air line monitoring, low-pressure process control, and differential pressure applications where traditional PSI gauges lack resolution.
Key Features
- Sensitive capsule-type design – Non-fillable, dry gauge for dependable operation across industrial environments
- 2.5-inch black steel case – Durable painted steel housing with clear dial readout
- Copper alloy and brass internals – Corrosion-resistant wetted parts ensure long service life
- ±1.6% full-scale accuracy – Certified accuracy meeting industrial measurement standards
- 1/4 NPT male bottom connection – Standard threaded port for straightforward plumbing integration
- Impact-resistant options – ABS or stainless steel case variants available
Technical Specifications
- Pressure Range: 0 to 100 inH2O
- Gauge Diameter: 2.5 inches (2-1/2″)
- Connection Type: 1/4″ National Pipe Thread (NPT) Male
- Connection Location: Bottom
- Case Material: Black painted steel (stainless steel and ABS variants available)
- Wetted Parts: Copper alloy and brass
- Accuracy Class: ±1.6% full scale
- Gauge Type: Sensitive capsule-type, non-fillable dry
- Series: Noshok 200 Low-Pressure Diaphragm
Typical Applications
- Compressed air distribution system monitoring
- Low-pressure process measurement and control
- Filter differential pressure indication
- Vacuum system monitoring (ranges available)
- HVAC and pneumatic equipment verification
- Laboratory and OEM equipment pressure indication
Compatibility & Replacements
Compatible With
- Compressed air systems and pneumatic circuits
- Hydraulic low-pressure monitoring
- Water and gas distribution networks
- Standard NPT-threaded instrument ports
- Diaphragm seal assemblies (Noshok standard and elevated pressure seals)
Replaces / Drop-In Replacement For
- Noshok 25-200 series gauges in equivalent ranges (e.g., 25-200-50-inH2O, 25-200-60-inH2O)
- Low-pressure analog gauges requiring 0–100 inH2O measurement
- Previous generation Noshok low-pressure models with same NPT connection
Works With
- Noshok replaceable and non-replaceable diaphragm seals
- Noshok distribution manifolds for multi-instrument monitoring
- Standard 1/4 NPT male port adapters and manifolds
- Compressed air and low-pressure gas piping systems
