Nunes Instruments

The Pygmy Type Water Current Meter is a small design for measuring the velocity of water from 0.025 to 3.0 m/sec. in rivers, streams, open canals, pressure pipes, lakes and seas

Pigmy Current Meter consists of streamlined body which houses the sensing mechanism, an encapsulated sensor, and the propeller shaft mounted such that each rotation of the shaft produces a pulse from the sensor. The pulses are conducted through a lead to the surface where they are counted by a current meter Counter. The velocity of the stream is proportional to the rotations of the propeller. The following equation is used to calculate the velocity.

The standard configuration is supplied with 0.5 mtr. x 3 sections of 9 mm diameter rod for locating in shallow to medium depth streams or rivers. The rod is graduated every 1cm. A point and base plate is used to position the rod in the river or stream bed.

The Current Meter provides a pulse to a Current Meter Counter. The Counter is a complete Digital counter which can be set to count pulses for a specific time period (10-90 secs). The counter stops when the time perio d has elapsed and shows a digital reading for the number of pulses.

The Digital TDS Meter is a portable and user-friendly tool designed to measure Total Dissolved Solids (TDS) in liquids, particularly water. With a wide measuring range of up to 9990 ppm, this meter helps ensure water purity and monitor filtration efficiency across various applications.

Using a titanium alloy electrode, the device delivers fast and accurate readings. It features automatic temperature compensation (ATC) to maintain accuracy under different water temperatures and a Hold function to freeze the displayed value for convenient reading and recording.

Compact and battery-powered, the TDS meter is ideal for both home and professional use in water quality testing.

• Wide TDS measuring range up to 9990 ppm

• Dual-resolution: 1 ppm for low range, 10 ppm for high range

• ±2% accuracy ensures dependable results

• Durable titanium alloy electrode

• Automatic Temperature Compensation (ATC)

• Hold function for easy data recording

• Portable and battery-operated for field or lab use

• Drinking water testing

• Aquariums and fish tanks

• Hydroponics and agriculture

• Water filtration and purification systems (RO/DI)

• Pools, spas, and industrial water systems

• Laboratory and environmental testing

The Digital Pressure Meter is an advanced measuring instrument designed to provide accurate, real-time readings of gas or liquid pressure in a digital format. Unlike analog meters, it eliminates parallax errors and provides precise results with easy-to-read displays. Many models also support absolute, gauge, and differential pressure measurement, making them versatile for both industrial and laboratory applications.

Digital pressure meters are widely used in HVAC systems, hydraulic and pneumatic testing, process industries, automotive diagnostics, and research laboratories for monitoring and quality control.

• Digital LCD Display – Provides clear, precise pressure readings without guesswork.

• Wide Measuring Range – From low-pressure ranges (mbar/Pa) to high pressures (bar/psi/MPa).

• High Accuracy & Resolution – Ensures reliable test results across applications.

• Multiple Units Conversion – Switch between psi, bar, kPa, mmHg, and more.

• Differential / Absolute / Gauge Models – Available based on requirement.

• Data Hold & Min/Max Functions – Stores and reviews measurement values.

• Optional Data Logging – Advanced models with USB or Bluetooth connectivity.