(+91) 9820305403 fgb.vinesh@gmail.com C-1209-B, Ghatkopar Ind. Est. 2nd Flr, LBS Marg, Ghatkopar W
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INCH OF WATER Manufacturers In India

High Sensitivity Low Draft Gauges Calibrated in Inches of Water Column (inH2O / inWC) for Burners & Ducts

ISO 9001:2015 Certified Manufacturing
IS3624 & EN 837-1 Standards
NABL Traceable Test Calibration
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Precision Instrumentation

INCH OF WATER Manufacturers In India

FGB Manufacturing Co. is recognized among foremost INCH OF WATER Manufacturers In India, engineering low-range capsule draft gauges graduated specifically in Inches of Water Column (inH2O / inWC / mmWC). Designed to measure minute static pressures in HVAC ventilation air ducts, boiler combustion chambers, industrial scrubbers, and paint spray booths, our water column gauges provide crystal clear visual readings where standard PSI gauges cannot register.
  • Graduated in True Inches of Water Column (inH2O / inWC) & mmWC
  • Standard Ranges: 0-5", 0-10", 0-15", 0-30", 0-60", 0-100", 0-200" inH2O
  • Ultra-Sensitive Diaphragm Capsule Element in Phosphor Bronze or SS 316
  • Robust Weatherproof SS 304 Housing with Zero Adjustment Feature
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Inch of Water Column Pressure Gauge Manufactured by FGB in India

FGB Precision Assembly: INCH OF WATER Manufacturers In India

Technical Parameters

Standard Technical Specifications

Engineered to satisfy demanding industrial criteria. Review our standard parameter ranges or request custom connection threads, dial branding, and special wetted alloys.

Specification Parameter Standard Technical Values / Manufacturing Options
Dial Sizes 63mm (2½"), 100mm (4"), 150mm (6")
Standard inH2O Ranges 0-5 inWC, 0-10 inWC, 0-20 inWC, 0-30 inWC, 0-60 inWC, 0-100 inWC, 0-200 inWC
Compound Draft Ranges -5 to +5 inWC, -10 to +10 inWC, -30 to +30 inWC
Accuracy Class ±1.6% FSD (or ±1.0% FSD on 150mm dials)
Sensing Core Corrugated Capsule Diaphragm Element
Case Material Stainless Steel 304 with Bayonet Lock Ring
Process Connection 1/8", 1/4", 3/8", 1/2" BSP / NPT Male Bottom or Back
Zero Adjuster External Zero Reset on Dial Faceplate
Design Highlights

Key Engineering & Operational Advantages

Built for continuous 24/7 industrial performance, long service life, and unmatched measurement stability.

Minute Draft Sensitivity

Registers fractional air pressure changes critical for burner air-fuel ratio efficiency.

HVAC Duct Optimization

Monitors supply and return airflow pressure drops across HEPA filters and dampers.

Compound Draft Capability

Balanced center-zero dials monitor fluctuating chimney draft from negative to positive.

Industrial Grade Build

Built for dusty plant rooms, boiler houses, and industrial outdoor environments.

Field Applications

Recommended Industries & Operating Environments

Trusted by plant engineers, system integrators, and OEM equipment builders across diverse sectors.

Boiler Combustion Chamber Draft & Flue Gas
Gas Fired Industrial Furnace Burners
Paint Booth Ventilation & Exhaust Scrubbers
HVAC Air Filter Resistance & Air Flow Balancing
Sewer Gas Pressure & Landfill Flare Monitoring
Marine Engine Room Negative Pressure Testing
Questions & Answers

Frequently Asked Questions (FAQs)

Find answers to common technical queries regarding specifications, selection, calibration, and delivery.

1 inH2O = 0.0361 PSI = 2.49 mbar = 25.4 mmWC. Standard pressure gauges cannot read such small pressures, making dedicated capsule inH2O gauges indispensable.

FGB capsule gauges are built with mechanical overpressure stops that prevent capsule over-stretching during minor line surges.

Yes, we supply dual dials with Inches of Water Column on the outer arc and mmWC or mbar on the inner arc.

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Fill in your required quantity and dial specifications. Our technical engineering team will respond within 2 hours with wholesale factory pricing.

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