Shand & Jurs 97400 Well-Type Manometer

For commissioning engineers, biogas technicians, and burner-train maintainers, the Shand & Jurs Biogas 97400 Well-Type Manometer provides direct liquid-column pressure verification on inches-water-column systems where transmitters and electronic gauges cannot reliably confirm operating pressure.

Unlike electronic indicators that depend on calibration, power, and periodic verification, the 97400 balances system pressure against a known indicating fluid column, producing a primary physical reference independent of drift, condensation effects, or instrument failure.

A vented petcock allows in-place zero verification, an optional float check valve protects the instrument from over-range surge, and panel mounting establishes a permanent reference point within gas trains, blanketing systems, and utility fuel lines.

Available in 12″, 20″, 24″, 30″, and 35″ W.C. ranges in English or metric scales with aluminum, steel, or stainless panel options, the 97400 supports commissioning, troubleshooting, and regulator-setting verification on low-pressure gas systems.

Features

Produces a primary physical pressure reference unaffected by transmitter drift or calibration offset, giving commissioning engineers a true measurement independent of electronic instruments.

Single instrument measures pressure, vacuum, or differential conditions, verifying performance across regulators, filters, arresters, and safety devices on low-pressure gas trains.

Vented petcock confirms instrument baseline without removing the manometer from service, supporting rapid zero checks during commissioning and periodic maintenance cycles.

Optional float check valve protects the indicating fluid from displacement during over-range pressure excursions, avoiding fluid loss and unexpected recalibration work.

Panel or wall mounting establishes a permanent pressure verification location, giving operators and commissioning engineers a consistent reference point during routine checks.

Range options from 12″ to 35″ W.C. match measurement resolution to the low-differential-pressure systems typical of biogas, digester, and utility fuel service.

Applications

Gas Trains: Verifies regulator and safety-device settings on fuel and biogas trains during commissioning and troubleshooting, independent of electronic instrument calibration or condition.
Burner Headers: Confirms header supply pressure feeding burners, supporting correct regulator setup and stable combustion performance during initial startup and periodic validation.
Blanketing Systems: Provides a direct reference for tank blanketing regulator setpoints, allowing operators to verify true header pressure rather than relying on inferred transmitter output.
Boiler Fuel Lines: Installed on boiler fuel gas supply to confirm pressure at the burner front, supporting commissioning and troubleshooting without dependence on site instrumentation.
Digesters: Verifies low-pressure digester header behavior during commissioning and upset troubleshooting, confirming regulator and safety-device settings in wet methane service.
Utility Gas Lines: Serves as a permanent reference on utility fuel gas distribution networks, supporting rebalancing and maintenance across multiple downstream consumers drawing from shared headers.

Specifications

Parameter

Specification

Measurement Types

Pressure, Vacuum, Differential

Range Options

12″, 20″, 24″, 30″, 35″ W.C.

Scale Options

English (in. W.C.) or Metric

Indicating Fluid

Green, Specific Gravity 1.0

Standard Fluid Temperature

30°F – 100°F

Mounting

Panel or Wall Mounted

Construction

Extruded aluminum housing; aluminum, steel, or stainless mounting panels

Float Check Valve

¼” NPT, Stainless Steel with Teflon Float

Vented Petcock

¼” NPT, Brass

Optional Flame Check

¼” NPT for end of vent line

2026 COST ESTIMATE

Contact Support

If you have questions not covered here, please contact the Cognesense support team for assistance.

Why use a liquid-column manometer when electronic gauges are available?

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Electronic gauges and transmitters depend on calibration and power; they can drift or fail. A liquid-column manometer balances system pressure against a known fluid column, producing a primary physical measurement independent of calibration, electronics, or power — valuable for commissioning and verification.

What ranges are available?

The 97400 is offered in 12″, 20″, 24″, 30″, and 35″ W.C. ranges, matching the measurement resolution required for low-differential-pressure systems typical of biogas, digester, and utility fuel applications.

How is zero verified without removing the manometer?

The vented petcock isolates the instrument from the process line so the baseline can be verified in place. Zero verification becomes a routine commissioning and maintenance step rather than requiring full removal from service.

What does the float check valve option do?

The optional stainless-steel float check valve with Teflon float prevents indicating fluid from being displaced or blown out during over-range pressure excursions, protecting the instrument and avoiding fluid loss during upset events.

What measurement types does the 97400 support?

The single instrument measures pressure, vacuum, or differential pressure, so a single tool verifies regulators, filters, flame arresters, and safety devices across the gas train during commissioning and troubleshooting.

How does the 97400 compare to the 97401 U-tube manometer?

The 97400 is a single-tube well-type manometer for direct pressure reference measurement; the 97401 is a U-tube manometer optimized for differential pressure across two points. Select the 97400 for primary pressure verification and the 97401 for pressure-drop measurement.

Summary

With over a century of tank-safety heritage inside Cognesense, the Shand & Jurs Biogas 97400 Well-Type Manometer is chosen where low-differential-pressure systems need a verification baseline independent of electronics. Its single-tube liquid column, vented zero-verification petcock, and optional float check deliver a direct physical pressure reference during commissioning and troubleshooting. Installed as a permanent reference on gas trains, blanketing systems, and utility lines, it is trusted wherever you need to measure, monitor, and protect what matters most.

97400 Well-Type Manometer