Measuring Instruments

“LEW” make Digital Rainfall Recorder (Tipping Bucket Type) is a fully computerized, digital and self contained power source system, fitted with Data Logger and battery charging solar panel with rechargeable, maintenance free batteries complete with sealed waterproof enclosure for Data Logger, Solar charger and battery. It comes with facility to transport from Data Logger to a Computer (As per Customer requirement).16x2 LCD alphanumeric display and 4x2 membrane keypad is provided at front panel of data logger for programming data logger and monitorin or reading at site without the help of computer . A tipping bucket  (cup) mechanism that triggers a magnetic reed switch once every unit of rainfall. Every pulses by Tipping bucket is counted by Data Logger . Data file is saved in Microsoft’s Excel.

The Double Ring Soil Infiltrometer is a simple instrument which is used to determine the infiltration rate of water into the soil. The infiltration rate is determinate as the amount of water per surface area and time unit, which penetrates the soils. This rate can be calculated on the basis of the measurements and the Darcy’s law. Several measurements can be executed simultaneously, yielding a very reliable and accurate mean result. As vertically infiltrated water runs away to the side. The outer ring of the infiltrometer serves as a separation. The measurement exclusively takes place in the inner ring through which the water runs virtually vertically. The instrument consists of two rings, driving plate, for inner and outer rings. The two rings are driven into the ground and partially filled with water. The double ring design helps prevent divergent flow in layered soils. The outer ring acts as a barrier to encourage only vertical flow from the inner ring. the standard set of the double ring infiltrometer consist of 2 steel rings with different diameters, a hammer, floats, a stainless steel hammering cross and a stopwatch.

We are a renowned firm indulged in exporting and supplying Mini Disk Infiltrometer used in various industries to test unsaturated hydraulic conductivity and infiltration rates. We offer hi-tech Mini Disk Infiltrometer that is compact and easy to use. Ideal for irrigation system design, classroom instruction and many other applications, Mini Disk Infiltrometer is economical too. We can process bulk orders for feature-packed Mini Disk Infiltrometer.

More information on Mini Disk Infiltrometer :

• The Mini Disk Infiltrometer is a quick way to test unsaturated hydraulic conductivity and infiltration rates.
• It's ideal for irrigation system design, classroom instruction, erosion hazard evaluation, burn severity studies, and many other applications. Small, compact, and simple, the Mini Disk Infiltrometer is a true field instrument.
• It can be tossed into a backpack with a bottle of water.
• Adjustable suction and a porous stainless steel contact plate assure a reliable soil unsaturated hydraulic conductivity measurement.

The Lakshmi Engineering works make Non recoding Rain Gauges are manufactured as per IS:5225 :1969. Rain Gauge is manufactured from non-corrosive fibre glass reinforced plastic container. It consists of collector assembled with brass Ring. Funnel, Locking Rings and Base. The Rain Gauge is supplied with 2 litres bottle and a measuring cylinder. Rain Gauges are available in 200 sq. cm collection areas. The essential parts of an ordinary rain gauge are a funnel through which the rain water is collected in a receiver and a measuring glass (rain measure) with which the rain water collected is measured. The correct type of rain measure suitable to the type of rain gauge in use has to be used for the measurement of rainfall. The rain measure is graduated for every0.2 mm of rainfall.

We are the most prominent manufacturer and supplier of quality-assured River Staff Gauge which find their applications in measuring water level. These products are widely accepted and appreciated by the large number of clients due to their optimum results and smooth performance.

Features :

• Accurate measuring
• Optimum performance
• Competitive price
• Long lasting durability
• Seamless finish
• Cost-effective
• Available in different sizes
• Reliable

Self-recording rain gauge (SRRG) is an automatic device used to record a continuous rainfall for 24 hrs on a daily chart, if rain occurs.

The characteristics of rainfall events viz. onset and cessation of rainfall, duration of rainfall, intensity of rainfall and the total amount of rainfall in mm can be obtained from the rainfall chart.

DETAILS OF EQUIPMENT

• It is a float type rain recorder in which the rain is led into a float chamber containing a light, hollow float.
• The rain gauge is installed on a level ground and fixed on a masonry foundation of 60 × 60 × 60 cm3 sunk into ground.
• Base of the gauge is cemented into the foundation so that the rim of the gauge is exactly 75 cm above the case of self-recording rain gauge.
• If the height of the rim were more, the rainwater collected would decrease because of the change in wind speed near the ground.
• Rainwater is entering the receiver through an 8-inch diameter funnel.
• The receiver is consisting of float and siphon chamber.

MEASURING PROCEDURE

• A pen is mounted on the stem of the float and as the level of water rises in the receiver, the float rises and the pen records on a chart placed on a rotating drum with clockwork arrangement, the amount of water in a receiver continuously.
• The clock work drum revolves once in 24 hrs.
• Siphoning starts automatically when the pen reaches the maximum point of the chart.
• If the rain continues, the pen rises again from the zero line on the chart.
• If there is no rain, the pen traces the horizontal line from where the rain stopped

This is an easy to use digital soil moisture sensor. Just insert the sensor in the soil and it can can measure moisture or water level content in it. It gives a digital output of 5V when moisture level is high and 0V when the moisture level is low in the soil.

The sensor includes a potentiometer to set the desired moisture threshold. When the sensor measures more moisture than the set threshold, the digital output goes high and an LED indicates the output. When the moisture in the soil is less thatn the set threshold, the output remains low. The digital output can be connected to a micro controller to sense the moisture level. The sensor also outputs an analog output which can be connected to the ADC of a micro controller to get the exact moisture level in the soild.

The Tensiometers are a simple, versatile, and inexpensive instruments that provide a direct measurement of soil water tension.

A Rain gauge is a device to measure liquid rainfall amount and intensity. The device is composed of a rain collector cone and a double-chamber tipping bucket connected to a magnet. The magnet operates one reed switch, which generates im-pulses that can be counted by external meters. Siphon versions (DQA230.1-231.1-230.3) are equipped with a siphon placed on the cone’s nozzle; it has function during heavy rain, to regulate the flow into the bascule permitting all the water to fall inside the tipping bucket. This solution gives its best results where the main need is the measurement of the total amount of rain over long periods.

Class A rain gauges versions (DQA230-231-235-236) have the “Class A” class accuracy as described by the UNI EN 17277:2020 standard. It is the most accurate class for intensity measurement. For the Class A accuracy achievement, a cor-rection formula on the data acquisition system is required.

“LEW” make Water Level Indicator is a reliable instrument for measuring the water level and total depth in boreholes, wells, reservoirs etc. For the measurement the bob is lowered to the water level. When touching the level, a sensor effects the illumination of a signal lamp & an additional acoustic signal will be released by a buzzer.

When the probe is touching the water-level there is a conductive connection between the tip of the probe and the sensor-body. Thereby a circuit of the lamp and the buzzer will be closed.

Response is seen on LED plus an audible tone is heard. Features include: Standard cable lengths: 100m, also available in 50, 150, 200 meter, with marking on every Millimeter, Centimeter, Meter. Reel-type spool for lowering cable and electrode assembly. Reel is mounted on a stand. Self- contained 9V AA type battery power supply – no danger of shock from an outside power supply. Standard brass electrode. Reel handles are shaped to fit your hands. Accurate of reading. Each Water Level Indicator is supplied with a battery.

Wind direction will be measure with a wind vane. Wind direction is the compass point from which the wind is coming eg south, southwest, west etc. The unit of measurement for wind direction is therefore compass direction. User plot the wind direction for each day of the month on a special graph called a wind rose i.e. Wind Vane is manufactured as per IS:5799:1970 which indicates the direction of wind at the point of observation.