Temperature Controllers

VT120 features Spot Detection technology that can detect objects instantly when placed on a wall, panel or foor. Since the VT120 never needs calibration,can focus on the job without worrying about accuracy. Three modes drywall, universal and concrete make this the right detector for multiple jobs. Universal mode sees throughmore material, it sees "anything in anything". This device offers sound and a light to show user when something is detected behind a wall, panel or under fooring.Intuitive radar scanner for almost all materials User benefit incl. Reason to believe Spot measurement provides accurate detection on narrow surfaces.Centre finder offers visual guidance, to clearly identify the precise location of the object's centre.Dual Power Source allows for use with a 12 V Li-ion battery or with standar d alkaline batteries.

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 VSC & VDC and using the value of CSC 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.

Product Description

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.

Key Features

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

Applications

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

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.

Key Features:

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 sys

V- TECH manufactures a very extensive package of process controllers. The single and dual-loop controllers are microprocessor-based and modular built. They are standard equipped with different control algorithms, including on-off, PID-A, PID-B and TPSC.Thermocouple health alarms, Accutune III automatic PID-tuning and Fuzzy Logic overshoot suppression are among the possibilities. Remote setpoints, digital inputs, alarm relays and transmitter power are a few of the numerous other options. A series setpoint programs, for example for annealing furnaces that have to run a temperature program, completes the portfolio.

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 VTE1900 module is designed for highly accurate measurement of relativehumidity (RH) or dew point temperature (Td) in climate chambers and otherdemanding applications. The humidity sensor is particularly resistant to dust andcorrosive agents and it performs even in chemically contaminated environment.The VTE1900 module consists of an electronics board and a sensing probe. Itemploys an innovative combined humidity and temperature sensing element,which is well protected from pollution and corrosion by the proprietary E+Ecoating. This leads to high accuracy and excellent long-term stability even underharsh environmental conditions.

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.

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.

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.

Key Features:

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.

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

Features:

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  Import

Laboratory Instrument, Test Equipment,

Scientific, Measuring, Precision Instrument,

Analytical, Bio Medical, Survey, Electrical,

Electronic Instruments ,Weather, Metrology.

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.

Key Features

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.

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 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.

Key Features

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

Applications

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 

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.

Key Highlights:

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.