Nunes Instruments

The V- TECH Pro 20PV Solar MPPT Meter can effectively identify any abnormalities in solar panels by testing their Maximum Power, Peak Power Voltage, Peak Power Current, Open Circuit Voltage, and Short Circuit Current.

Featuring a large display and automatic measurement capabilities, this device conveniently displays all measurement results simultaneously.
The V- TECH Pro 20PV Solar MPPT Meter’s portable design enables easy carrying, greatly enhancing the operational and maintenance efficiency for Photovoltaic and Solar Panel manufacturers, installers, and end users.

Features:

• Maximum Power Test (Pmax): 5～800W
• Peak Power Voltage (Vmp): 12～ 60V
• Peak Power Current (Imp): 0～35A
• Open Circuit Voltage (Voc): 12～60V
• Short Circuit Current (Isc): 0～35A
• Large screen and multiple result display: A single measurement that displays all essential test values can significantly enhance work efficiency.
• No batteries needed, powered by the solar panel: There is no requirement for batteries as the measurement can be effortlessly performed for extended periods.
• Equipped with MC4 test lead: With the MC4 connector already included, there is no need for additional solar panel connectors. This enables quick and efficient measurements to be performed effortlessly.
• Portable and convenient: With its portable and lightweight design, this meter provides operators with convenience and ease of use, making it an incredibly versatile and indispensable tool for a wide range of tasks.
• Certifications: CE, cETLus, RoHS

The V-Tech Seven-Segment LED Countdown Timer is a precise and durable timing device suitable for industrial and event applications. It features a multi-digit seven-segment LED display capable of showing days, hours, minutes, and seconds for accurate countdowns. Available in red and other color options, the timer is designed for high visibility in both indoor and semi-outdoor environments. Constructed from sturdy materials like stainless steel, aluminum, or zinc alloy, it ensures long-lasting performance. The timer operates on standard voltages and can be wall-mounted or surface-mounted as per installation requirements.

• Multi-digit seven-segment LED display for days, hours, minutes, and seconds.

• High-accuracy countdown functionality with timing capacity up to 99%+.

• Available in red or other LED colors for visibility.

• Durable construction with stainless steel, aluminum, or zinc alloy frame.

• Flexible mounting options: wall-mounted or surface-mounted.

• Operates on standard voltages (110–120 V).

• Suitable for industrial, commercial, and event countdown applications.

• Industrial process monitoring and production cycle countdowns

• Event management timers for conferences, sports, and exhibitions

• Promotional countdown displays for marketing campaigns

• Time-sensitive projects or milestones in factories and workshops

The V-Tech Digital Temperature & Humidity LED Display offers precise environmental monitoring with high visibility. Featuring large 70 mm red LED digits, it simultaneously displays temperature and relative humidity, ensuring readability even from a distance. Its inbuilt DHT22 sensor guarantees stable and reliable measurements. The robust MS powder-coated or aluminum cabinet, combined with a protective 2 mm Lexan front sheet, ensures durability in indoor and semi-industrial environments. Configuration and data adjustment can be conveniently performed via serial communication.

• Dual display of temperature (°C) and humidity (%) with large 70 mm digits.

• High-brightness red LED display for clear visibility.

• Accurate and reliable DHT22 sensor for ambient monitoring.

• Durable MS powder-coated or aluminum cabinet with Lexan front protection.

• Data adjustment and configuration via serial communication.

• Easy wall-mount installation with included clamps.

• Indoor environmental monitoring

• Laboratories and research facilities

• Warehouses and storage areas

• Industrial HVAC monitoring

• Process control environments

The Compact Digital Tensile and Compression Testing Machine is designed for precision testing of small specimens and components, with load capacities of 500 N or 1000 N. It features a short test stroke of 50 mm, making it ideal for controlled tensile and compression testing. With a digital display, the machine ensures easy and accurate force readings, while its robust design guarantees durability for industrial usage.

• Maximum load capacity: 500 N or 1000 N

• High accuracy: ±1% or 0.1 N resolution

• Short test stroke of 50 mm for small sample testing

• Digital display for precise readings

• Suitable for both tensile and compression testing

• Compact, durable frame for industrial environments

• Overload protection and secure gripping system

• Industrial testing of lightweight materials and components

• Tensile and compression strength evaluation of plastics, wires, films, or connectors

• Quality control in manufacturing processes

• Educational and research use in materials science labs

• Validation testing to ASTM/ISO standards for small load applications

• High Accuracy Control
• History management
• 300 pattern setting
• Temperature & Humidity PID group
• Convenient communication data management
• Various output type.

Nunes Instruments , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

• Laboratory Instrument, Test Equipment,
• Scientific, Measuring, Precision Instrument,
• Analytical, Bio Medical, Survey, Electrical,
• Electronic Instruments ,Weather, Metrology.

• VT DC1000 Series digital controllers
• General purpose controllers
• VT DC1010: 1/16 DIN 48 x 48 mm
• VT DC1020: 1/8 DIN 48 x 96 mm
• VT DC1030: 3/16 DIN 72 x 72 mm
• VT DC1040: 1/4 DIN 96 x 96 mm
• 1 universal analog input
• 2 control outputs 4-20mA, relay or SSR
• Alarm relay
• Optional setpoint programming

The Clean Room Monitoring System is a state-of-the-art solution designed to maintain strict environmental control in critical applications. Crafted with high-quality VT316 material, it ensures durability, reliability, and hygiene, meeting global standards.

• Regulatory Compliance:
  Compliant with USFDA 21 CFR Part 11 and GAMP-4 standards, with integrated EMS SCADA-compatible data logging.

• Compact Design:
  Slim, all-stainless-steel enclosure with a 35 mm depth, perfect for prefab panel installations.

• Communication Flexibility:
  Offers multiple connectivity options including MODBUS RTU (RS-485), Ethernet TCP-IP, RF Wireless, Wi-Fi, and Bluetooth.

• Accurate Monitoring:
  Equipped with highly stable, digital built-in or remote sensors for monitoring temperature (Temp.) and relative humidity (RH).

• Display Options:
  Features RED LED displays (0.56" or 1") and touchscreen LCD displays (3.2", 4", or 7") for clear and intuitive data presentation.

• Data Security:
  Includes internal memory with time stamping and auto data backfilling to prevent data loss.

• Alarm System:
  Provides user-selectable set limits for alarms, with an audible buzzer and acknowledgment system. High/low status LEDs indicate process parameters and AHU On/Trip status.

• Advanced Protection:
  Offers 3-level password protection for calibration and programming, with synchronized time display using Master, Server (NTP), or GPS.

• Flexible Installation:
  Designed for flush or wall mounting, available in standard and flameproof models for hazardous environments.

The V-Tech Dual Setpoint Temperature Controller is a precision-engineered device designed to maintain accurate temperature control in industrial, laboratory, and commercial applications. This advanced controller allows users to set two independent temperature setpoints, ensuring precise regulation for heating and cooling processes.

• Dual setpoints for independent temperature thresholds
• High-accuracy microprocessor-based control
• User-friendly interface with an intuitive digital display
• Versatile compatibility for various heating and cooling applications
• Reliable performance with durable design and high-quality sensors
• Alarm system with audible and visual alerts for deviations beyond set limits

The V-Tech Temperature & Humidity LED Display provides clear and accurate environmental readings for indoor applications. It features a red high-bright LED matrix with 10 mm pixel pitch, displaying temperature and humidity simultaneously with large 70 mm digits. The inbuilt DHT 22 sensor ensures precise measurement, while the durable MS powder-coated cabinet provides long-lasting protection. Data adjustments can be made conveniently through a serial cable, and the single-sided wall-mount design allows easy installation.

• Dual display of temperature (°C) and humidity (%) with large 70 mm digits.

• Red high-bright LED matrix for easy visibility.

• Accurate DHT 22 sensor for reliable measurements.

• Single-sided display, ideal for indoor use.

• Durable MS powder-coated cabinet.

• Wall-mountable with included clamp.

• Data editable via serial cable.

• Indoor environmental monitoring

• Laboratories and research facilities

• Warehouses and storage areas

• HVAC and process control environments

The Digital Humidity Indicator / Controller is a versatile device used for accurate monitoring and control of relative humidity (RH) in industrial, commercial, and environmental applications. It typically features a large LED or LCD display, offering clear visibility of humidity levels — and optionally, temperature.

With a measurement range of 0% to 100% RH and high accuracy (±3%RH), the unit ensures reliable performance in sensitive environments. Input is received from a compatible humidity sensor, and advanced models support features like relay output control, analog retransmission, and data logging for system integration and traceability.

• Clear, easy-to-read LED/LCD display

• Measures relative humidity (RH) from 0% to 100%

• ±3% RH accuracy in standard working conditions

• Supports sensor input and various output configurations

• Ideal for industrial process control, HVAC, and lab monitoring

• Operates on AC mains power

• HVAC systems and climate-controlled environments

• Greenhouses and agricultural facilities

• Pharmaceutical and cleanroom monitoring

• Industrial drying and processing units

• Data centers and archival storage areas

Objective: Determination of dielectric constant of PZT material with Temperature variation and thus determining Curie Temperature.

Theory: Ferro-electricity usually disappears above a certain temperature called the transition (or Curie) temperature. Knowledge of the Curie temperature and the variation of the dielectric constant below and above the Curie temperature are of interest to the physicists and the engineers.

In this experiment an LC circuit is used to determine the capacitance of the dielectric cell and hence the dielectric constant. The circuit details are shown below:

DC : Dielectric Cell

SC : Standard Capacitor

L : Induction

X : Ferroelectric Sample

The dielectric cell DC is placed in PID controlled hot air furnace. The temperature of the furnace can be measured by inserting a thermocouple in a hole (provided on one of the Teflon discs), so that it touches one of the capacitor (metal) plates.

The audio oscillator is incorporated inside the instrument. If CSC and CDC represent the capacitances of the standard capacitor and dielectric cell respectively and if VC1 and VC are the voltages across SC and DC then

 
By measuring V_SC & V_DC and using the value of C_SC we can determine the capacitance of the dielectric cell containing the sample.

If C⁰ represents the capacitance of the dielectric cell without the crystal and the plates separated by air gap whose thickness is the same as the thickness of the crystal then C⁰ is given by

where r represents the radius of the crystal and d represents its thickness

The dielectric constant of the crystal at any given temp. is given by

 
The Setup facilitates determination of dielectric constant of PZT sample at different temperature. Dielectric Constant increases as temperature increases, and near Curie temperature, it shows a steep increase and reaches a peak at Curie Temperature.

The V-Tech Intelligent Controller is a state-of-the-art automation solution designed for precision control, efficiency, and seamless integration. Engineered with advanced microprocessor technology, this controller ensures optimal performance across various industrial, commercial, and residential applications.

• Smart automation with intelligent decision-making algorithms for enhanced operational efficiency.
• Multi-protocol compatibility, supporting Modbus, Ethernet, and other standard communication protocols.
• Real-time monitoring with instant data tracking and remote access for superior control.
• User-friendly interface with an intuitive touchscreen or web-based control panel for easy configuration.
• Energy-efficient design optimized to reduce operational costs.
• Scalable architecture for future upgrades and system enhancements.
• High security and reliability with robust encryption and fail-safe mechanisms for uninterrupted operation.