Instrumentation

The DC Earth and Ground Fault Locator is a precision diagnostic instrument designed to detect and locate ground faults and insulation failures in DC systems operating at 220V, 110V, 48V, and 24V. With a versatile transmitter capable of injecting test voltages up to 1000V and a receiver powered by a long-life lithium battery, this system provides real-time, reliable measurement of earth resistance and leakage current without interrupting operations. Ideal for use in telecommunication power systems, railway DC networks, battery banks, and solar PV arrays.

Key Features

• Compatible with multiple DC voltage levels (24V to 220V)

• Real-time online earth resistance measurement (up to 1MΩ)

• Selectable test voltage levels: 110V, 250V, 500V, 1000V

• Automatically adjusts to system capacitance up to 150µF

• Low signal current to ensure system safety (≤5mA RMS)

• Receiver with built-in lithium battery supports 20 hours continuous use

• Quick charge functionality for emergency troubleshooting

• Current clamp supports both dual and single conductor modes

• Auto shutdown and power-saving features

• Compact, portable, and efficient for field diagnostics

Applications

• DC power distribution systems (railways, telecoms, etc.)

• Battery backup systems and UPS networks

• Ground fault detection in solar photovoltaic installations

• Troubleshooting insulation faults in industrial DC systems

• Maintenance of DC control panels and critical infrastructure

Included Accessories
• Sensor battery
• Wrist strap
• AC charger
• USB-to-microUSB cable
• Carrying pouch
• Quick Reference Card
• Fertilizer Estimation Chart  

To ensure the accuracy of your readings, hold the sensor 24" – 48" (60 – 120 cm) above the crop when the trigger is pulled. The sensor's field of view is an oval; the field of view widens as the height of the sensor above the ground increases. 

The Leaf Wetness Sensor is standarised, calibrated, and designed to detect wetness and ice after installation. With denser leaf vein patterns on the surface, smaller droplets can be detected and the measurement is more sensitive. The sensor surface coating is non-hygroscopic, eliminating false wetness detection.

This leaf surface wetness sensor working principle is to measure wetness through the change of the leaf surface dielectric constant with good sensitivity, it can detect trace water or ice residues on the surface of leaves. The appearance is completely waterproof and can be used outdoors for a long time. Easy to use, widely used in green houses, laboratories, breeding, production environments, artificial climate rooms, and other plants or object surface humidity measurement.

We are offering Wind Speed Direction Sensor to our clients.

Feature:

• Adapt to complex weather conditions
• No moving parts, long service life
• The surface preservative treatment
• Strong anti-interference
• High accuracy

Application:

• Environmental monitoring
• Sea-going vessel
• Bridge & Tunnel
• Solar and wind power generation
• Wind resource assessment
• Drilling platform
• Automatic weather station
• Agriculture

Specification:

 

 

The VT-2160 temperature humidity duct sensors is for use in air ducts of ventilation and air condition for acquiring the temperature and relative humidity. It comes with a duct clamp ( flange ) for mounting & has a dual output of 0-10vdc for temperature & 0-10 vdc for humidity.


Extensive applications in the below areas

• Control sensors in the HVAC duct for the supply & extraction.
• Dual analog output of 0-10 VDC makes ideal for application in pharmaceutical
• plants, hospitals, green houses, semiconductor manufacturing plants, hotels & shopping complexes , etc.
• Can be connected directly to PLCs or controllers for monitoring on BMS systems & HVAC validations.

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.

Universal temperature sensors are available in two versions, standard and heavy-duty. The standard version is used in vessels and pipes with aggressive or explosive liquids or gases. The heavy-duty version is used in harsh environments. Our temperature sensors are available with individually selectable insertion length and with thermo wells in a welded, drilled or turned design. A wide choice of process connections and housings is available to meet your process requirements.

• Obtain the most precise measuring results.
• Benefit from the highest sensor stability in demanding applications.
• Reach optimal plant productivity and efficiency by selecting the most appropriate and correctly dimensioned temperature sensor for your process.
• Type: Ultrasonic

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.

Product Description
Goverment approved AIS 140 Gps and IRNSS based Indian made vehicle tracking device. Compitable for all public transport vehicle and commercial vehicle.

The Load Cell Transducer is a precision sensor designed for accurate measurement of force and weight in industrial and laboratory settings. With a rated capacity engineered for high-accuracy loading, it provides consistent output in mV/V, even under challenging environmental conditions. Built with humidity-resistant coating and shielded cables, it ensures long-term durability and resistance to interference. Its robust design minimizes side load sensitivity and hysteresis errors, making it ideal for demanding applications.

Key Features

• High-precision full-scale output (e.g., 2 mV/V)

• Low hysteresis and combined error for accurate repeatability

• Strong resistance to off-axis forces and environmental conditions

• Safe overload range up to 200% of rated capacity

• Compatible with most standard signal conditioners and amplifiers

• Rugged construction with environmental protection

This soil moisture sensor operates on a low DC voltage range of 3.3 V to 5 V, making it compatible with a wide variety of microcontroller and data-logging platforms. With a minimal current draw of about 5 mA, it is ideal for low-power and battery-operated systems.

The sensor provides a 0–3.0 V analog output that varies proportionally with soil moisture levels, enabling accurate measurement after proper calibration. Its accuracy of ±3% is dependent on soil composition and calibration procedures. Constructed from FR4 material, the sensor is durable, non-corrosive, and suitable for long-term soil embedding.

Key Features

• Low operating voltage and minimal current requirement

• 0–3.0 V analog output suitable for microcontrollers

• ±3% accuracy with proper soil calibration

• FR4 construction ensures durability and corrosion resistance

• Suitable for continuous soil monitoring applications

Applications

• Agricultural irrigation systems

• Smart farming and automation

• Greenhouse monitoring

• Soil moisture research and experimentation

• IoT-based environmental sensing

The V-T (M) series is a stainless-steel miniature load cell crafted to measure force with graceful accuracy, whether the force arrives as a push or a pull. Its compact body hides a precise sensing core that maintains stability under demanding industrial conditions. With capacity options ranging from delicate 20 kgf measurements to robust 2-ton loads, this load cell adapts easily to machines both small and mighty. The IP67 protection class shields it against dust and moisture, letting it perform reliably in environments where equipment often endures splashes, vibration, and unpredictable weather. Stable rated output, low nonlinearity, and finely tuned repeatability allow the V-T (M) to translate mechanical force into a clean, trustworthy electrical signal.

Key Features

• Stainless-steel construction for corrosion resistance and long life.

• Supports both compression and tension measurements.

• Multiple capacity options from 20 kgf to 2 tf.

• High accuracy with low nonlinearity, hysteresis, and excellent repeatability.

• Rated output of 2 mV/V for stable instrumentation integration.

• IP67 protection for harsh industrial environments.

• Safe overload rating of 120% to withstand unexpected force spikes.

• Comes with a durable 3-meter, 4-core shielded cable.

Applications

• Precision force measurement in compact machinery.

• Press-fit and assembly force monitoring.

• Robotics and automation systems requiring push–pull sensing.

• Industrial test rigs, R&D setups, and calibration benches.

• Tank, hopper, and structural load monitoring (with suitable mounting).

Specification:

• Input voltage: DC 5±0.2V
• Power: 150mA
• DO output: TTL digital 0 and 1 (0.1 and 5V)
• AO output: 0.1-0.3V (relatively clean), the highest concentration voltage is about 4V.
• Dimensions: 33(L) * 21(W) * 17(H) mm
• Wire connecting method:
• VCC - positive pole (5V)
• GND - negative pole
• DO - TTL switch signal output
• AO - analog signal output
• Package included:
• 1 x MQ-7 sensor module

Feature:

• Long life and stability
• Four screw holes for easy positioning
• High-quality dual panel design with power indicator

Note:

When the sensor is powered, it needs to be warmed up about 20 seconds. So the measured data become stable, the heat sensor is a normal phenomenon. Its inside is included heating wire, but if too hot, it is abnormal.