Overview
The Noshok 25-200-5-PSI is a dry, low-pressure diaphragm gauge from the 200 Series. It features a 2.5″ (63 mm) black steel case with a sensitive copper alloy diaphragm capsule, brass process connection, and acrylic window. This non-fillable gauge is designed for applications where precise, direct pressure measurement is required in the 0–5 PSI range.
Key Features
- Accurate measurement: ±1.6% full-scale accuracy for reliable readings
- Durable construction: Black painted steel case with copper alloy diaphragm and brass wetted parts
- Low-pressure design: Optimized capsule-type geometry for sensitivity in the 0–5 PSI range
- Dry, non-fillable: No internal fluid; suitable for dry air and non-corrosive gas applications
- Wide temperature range: Rated for −4 to +176°F (−20 to +80°C) media conditions
- Standard connection: 1/4″ NPT male bottom-side process connection for easy installation
Technical Specifications
Measurement & Accuracy
Pressure Range: 0 to 5 PSI
Accuracy: ±1.6% Full Scale
Measuring Element: Phosphor Bronze/Copper Alloy Diaphragm
Physical & Connection
Dial Size: 2.5″ (63 mm)
Case Material: Black Painted Steel
Wetted Parts: Copper Alloy Diaphragm, Brass Connection
Process Connection: 1/4″ NPT Male, Bottom-side
Gauge Fill
Type: Dry (Non-Fillable)
Operating Conditions
Operating Temperature: −20 to +60°C (−4 to +176°F)
Pressure Media Temperature: −20 to +80°C (−4 to +176°F)
Performance Limits
Dynamic Pressure Limit: 60% of dial range
Static Pressure Limit: 90% of dial range
Typical Applications
- Filter monitoring and pressure drop detection
- Gas distribution and HVAC systems
- Leak detection and pressure verification
- Level indication in low-pressure vessels
- Medical and laboratory gas systems
- Low-pressure pneumatic system monitoring
Compatibility & Replacements
Compatible With
- Standard 1/4″ NPT threaded process connections (male bottom)
- Dry air and non-corrosive gas applications
- Low-pressure monitoring in pneumatic systems
- Optional diaphragm seals for corrosive media isolation (available from Noshok)
Replaces / Drop-In Replacement For
The Noshok 25-200-5-PSI is directly interchangeable with other 0–5 PSI, 2.5″ 200 Series gauges with identical 1/4″ NPT bottom connections. Verify connection orientation and pressure range before substitution.
Works With
- HVAC and pneumatic system monitoring
- Filter housings and regulator assemblies
- Gas distribution manifolds
- Diaphragm seal assemblies (replaceable and non-replaceable types available)
- Steam siphons and protective instrumentation accessories
