Nunes Instruments

This apparatus is designed for students to explore the fundamental principles of capacitance, its relationship with charge and voltage, and how it's influenced by physical parameters. It provides a hands-on method to understand electrostatics and the behavior of electric fields.

Product Description:

The Parallel Plate Capacitor Experiment apparatus typically consists of two parallel, conductive metal plates mounted on insulated supports. These supports allow for easy and precise adjustment of the distance between the plates. The experiment usually includes various dielectric materials (e.g., glass, acrylic, cardboard) that can be inserted between the plates to observe their effect on capacitance. Connection terminals are provided to link the plates to an external power supply, electrometer, or voltmeter for measurements.

Key Features (6 points):

1. Adjustable Plate Separation: Features a precise mechanism to vary the distance between the parallel plates, allowing for direct investigation of the inverse relationship between capacitance and plate separation (C∝1/d).
2. Interchangeable Dielectric Materials: Comes with multiple dielectric sheets (e.g., air, glass, plastic) to demonstrate the impact of different insulating materials on capacitance and to determine their respective dielectric constants (C=κϵ0​A/d).
3. Large Plate Area: Utilizes sufficiently large conductive plates (e.g., 120mm to 25.5cm diameter) to minimize edge effects and provide a more uniform electric field between the plates, simplifying theoretical calculations.
4. Insulated Supports: Plates are mounted on highly insulating stands to prevent charge leakage and ensure accurate measurements of charge and potential difference.
5. Clear Markings and Easy Assembly: Designed for straightforward setup and operation, with clear scales for distance measurement and easy-to-connect terminals, making it suitable for educational environments.
6. Versatile for Multiple Experiments: Enables a range of experiments including determining the permittivity of free space (ϵ0​), investigating the relationship between charge, voltage, and capacitance (Q=CV), and studying the effect of dielectric insertion on electric fields and capacitance.

This Hydrogen Gas Sensor Transducer Module is a diffusion-type, intrinsically safe gas detector engineered for precise, real-time measurement of hydrogen gas concentrations in hazardous or industrial environments. Featuring a fast response time of less than 3 seconds and a highly selective sensor, it delivers reliable performance in safety-critical applications such as fuel cells, battery storage areas, and chemical processing plants.

The transducer is housed in a rugged metal body, integrating both the sensor and pre-amplifier. It includes a flanged head for secure mounting and uses shielded Teflon cables with round connectors to minimize interference and ensure safe, stable signal transmission.

• Ultra-fast response time (<3 sec) for critical detection

• High specificity to hydrogen gas, reducing cross-interference

• Intrinsically safe (Ex ia II) design for hazardous zones

• Integrated pre-amplifier in robust metal housing

• Flexible power options: 12 VDC ±10% or 20–30 VDC

• Low output current (<0.5 mA) ensures energy-efficient operation

• Shielded connectivity for signal integrity and electrical safety

• Compact dimensions with flanged head for easy mounting

• Hydrogen leak detection in fuel cell systems

• Safety monitoring in battery rooms and charging stations

• Petrochemical and refinery environments

• Semiconductor and lab-scale hydrogen handling

• General industrial process monitoring involving hydrogen

The Opacity Meter is a precise instrument designed to measure the opacity or transparency of materials such as films, paper, plastics, coatings, or textiles. With a high-resolution digital readout and a measurement range of 0 to 100%, it enables accurate evaluation of how much light is blocked by a given sample.

Compact and easy to operate, the instrument features a durable metal housing, ensuring robust performance in industrial or laboratory settings. It is typically suited for sample sizes up to 50 x 50 mm, allowing for standardized material testing.

• Wide measurement range from fully transparent (0%) to completely opaque (100%)

• High resolution (0.1%) and accuracy (±0.2%) for precise readings

• Accepts standardized sample dimensions (e.g., 50x50 mm)

• Metal body construction ensures long service life and resistance to handling

• Operates on standard 220V AC, 50Hz supply

• Easy-to-read display and intuitive interface

• Printing and packaging material inspection

• Film, plastic, and paper opacity verification

• Paint and coatings coverage evaluation

• Textile industry for dye uniformity and thickness measurement

• Quality control laboratories

• Research and development departments

The Portable Clamp-On Ultrasonic Flow Meter is a high-precision, non-intrusive instrument designed for accurate measurement of liquid flow in municipal water, wastewater, and industrial applications. Using transit-time ultrasonic technology, it measures flow externally, eliminating the need to cut pipes or interrupt the process. The device features an IP67 flow transmitter and IP68 watertight transducers, ensuring reliable performance even in harsh outdoor environments. The F401 model is widely recognized for its accuracy, long-term stability, and ability to detect even very low flow rates, making it a dependable solution for field campaigns and leak detection.

• Non-intrusive clamp-on flow measurement

• High accuracy and long-term stability

• Detects very low flow rates—ideal for leak detection

• No process interruption, no pipe cutting

• Robust IP67/IP68 protection for harsh field use

• Battery-powered for long-term portable operation

• Fast, tool-free installation

• Suitable for a wide range of pipe diameters

• Highly reliable for municipal water & wastewater utilities

• Municipal water distribution

• Wastewater flow monitoring

• Leak detection & pipeline integrity checks

• Industrial utilities & process flow measurement

• Field measurement campaigns

• Temporary flow testing during maintenance

• Non-invasive metering in sensitive pipelines

The VT-393 Net Heat Meter Calculator specially developed for centralized Air Conditioning applications which are mainly consumed. Used in building automation systems. This is comes with RTD PT 1000 temperature transmitters for accurate real time clock is used to calculate the totaliser values temperature sensing. Most reliable 4-20 mA loop is very accurate.

he Diaphragm Gas Meter is a high-precision instrument designed for accurately measuring volumes of LPG, natural gas, and other non-corrosive gases. Its durable steel casing ensures long-term reliability and resistance to corrosion.

This gas meter is suitable for residential, commercial, and industrial applications, offering dependable volumetric measurement. Many models conform to ISI certification standards for quality assurance in India. The device is available from authorized suppliers and gas equipment distributors.

• Measures gas consumption accurately and reliably

• Robust steel casing for long service life

• Suitable for LPG, natural gas, and other non-corrosive gases

• ISI-certified models available

• Mechanical display for easy reading

• Homes and apartments

• Commercial buildings and offices

• Industrial gas measurement

• Utility monitoring and billing

• Gas distribution networks

The Peak Flow Meter is a compact, portable, hand-held respiratory device designed to measure the maximum speed of air expelled from the lungs, known as Peak Expiratory Flow (PEF). With a measurement range of 60 to 800 L/min, it helps users monitor lung function and detect early signs of airway obstruction. The device features a color-coded three-zone management system—green for good control, yellow for caution, and red for medical alert—to help individuals track their respiratory status based on their personal best readings. It is widely used by asthma patients, healthcare professionals, and medical students for accurate respiratory assessment and daily monitoring.

• Measures Peak Expiratory Flow (PEF/PEFR) from 60 to 800 L/min

• Color-coded three-zone indicator for easy asthma management

• Helps identify airway obstruction before symptoms appear

• Lightweight, durable, and easy to use

• Suitable for children and adults

• Provides quick and reliable lung function assessment

• Daily asthma monitoring

• Respiratory function evaluation

• Hospital, clinic, and home use

• Early detection of airway constriction

• Patient education and medical training

The Air Flow Calibrator is a high-precision instrument designed to calibrate air sampling devices such as dust samplers, gas samplers, and personal air monitors. It ensures accurate measurement of air flow rates, which is critical for reliable environmental and occupational health monitoring. This device is commonly used in laboratories, industries, and field studies to maintain traceability and compliance with national and international standards.

Key Features:

• Flow Range: Typically 1 to 50 LPM (liters per minute); other ranges available

• Accuracy: ±1% of reading or better

• Display: Digital LCD or touchscreen for real-time flow rate display

• Measurement Units: LPM, m³/min, SCFM (user-selectable)

• Sensor Type: Laminar flow element or thermal mass flow sensor

• Calibration: Factory-calibrated with traceable calibration certificate (e.g., NABL or NIST)

• Portability: Lightweight, compact, and battery-operated (optional)

• Power Supply: Rechargeable battery or 230V AC power

• Housing: Rugged aluminum or ABS enclosure suitable for field use

• Data Logging: Optional internal memory or USB interface for data export

Optional Features:

• Bluetooth/Wi-Fi connectivity

• Touchscreen interface with graphical trend display

• Real-time pressure and temperature compensation

• Carrying case for portable calibration tasks

Applications:

• Calibration of environmental samplers (e.g., high/low volume dust samplers)

• Personal air sampling pump verification

• Flow calibration for gas analyzers and emission monitoring systems

• Occupational exposure assessments

• Laboratory and field calibration tasks

Standards Compliance:

• Follows USEPA, NIOSH, OSHA, ISO 17025 recommendations for air sampling calibration