RAPID MOISTURE METER AZA0874

Description

Principle of Operation

The AZA0874 operates on a chemical reaction principle. When moisture present in the sample reacts with calcium carbide (CaC₂) inside a sealed pressure vessel, acetylene gas (C₂H₂) is generated. The pressure produced is directly proportional to the moisture content of the sample.

A precision-calibrated pressure gauge mounted on the vessel directly indicates the moisture content as a percentage (wet weight basis). No external power source is required, making the instrument highly suitable for field conditions.

Key Features

• Rapid on-site moisture content determination
• Proven calcium carbide gas pressure method
• Direct percentage moisture readout
• No electricity or batteries required
• Simple operation with results in minutes
• Compact, rugged, and highly portable design
• Ideal for construction and geotechnical field use

Applications

• Earthwork and embankment compaction control
• Road and pavement construction
• Aggregate and sand moisture assessment
• Concrete production and mix control
• Routine geotechnical field investigations

Technical Specifications

Model Number: AZA0874
Measurement Principle: Calcium Carbide Gas Pressure Method
Test Type: Field / On-site testing

Moisture Content Range:

• Typically 0–25% or up to 0–50% (depending on gauge calibration)

Accuracy:

• ±0.2% at low moisture levels
• ±0.5% at higher moisture levels

Main Components:

• Airtight pressure vessel (robust aluminum alloy)
• Precision pressure gauge calibrated in % moisture
• Secure sealing clamp
• Portable weighing balance (approx. 20 g capacity, 0.01 g readability)
• Chrome steel mixing balls
• Measuring scoop and cleaning brush

Reagent:

• Calcium carbide powder (supplied separately)

Power Requirement:

• None (self-contained chemical reaction)

Portability:

• Supplied in a sturdy carrying case suitable for site use

Compliance:

• Designed in accordance with ASTM D4944
• IS 2720 (Part 2) – equivalent principles

Construction:

• Durable, field-ready design for harsh site environments

Operating Procedure (Summary)

1. Weigh the required sample using the balance.
2. Place the sample, steel balls, and calcium carbide into the vessel.
3. Seal the vessel securely using the clamp.
4. Shake vigorously to initiate the reaction.
5. Read the moisture percentage directly from the pressure gauge within a few minutes.

Frequently Asked Questions (FAQ)

Q1: What is the AZA0874 Rapid Moisture Meter used for?
It is used for quick and accurate determination of moisture content in soils, aggregates, sand, and similar materials directly at site.

Q2: How does the instrument measure moisture?
Moisture reacts with calcium carbide to produce acetylene gas, and the resulting pressure is measured and displayed as moisture percentage.

Q3: Does AZA0874 require power or batteries?
No. It operates entirely on a chemical reaction and requires no external power.

Q4: How fast are the results?
Typically within 5–10 minutes, allowing immediate corrective action on site.

Q5: Which standards does AZA0874 follow?
It conforms to the principles of ASTM D4944 and IS 2720 (Part 2).