| Wind speed Sensor |
3 Cup Anemometer. |
| Sensing |
3 cup assembly mounted on friction free shaft and coupled to a chopper |
| Starting threshold |
0.3 meters/sec |
| Range |
0 to 65 meters/sec |
| Distance constant |
2.5 Meters |
| Output |
TTL pulses output proportional to wind Built in line driver to drive long cable > 50 ohms loop resistance. |
| Accuracy |
Better than 0.5 m/s up to 10 m/s + 2% FSD |
| Diameter of cup |
50 mm. |
| Diameter of cup assembly |
165 mm. |
Construction of sensor body : Brass housing and stainless steel shaft .
Principle of OperationAnemometer is a fast response, low threshold opto electronic anemometer. When rotated by wind, a chopper on the anemometer shaft interrupts an infra red light source , generating pulses from a photo transistor. The signal is amplified and fed through a line driver . The frequency is proportional to wind speed. The anemometer is provided with a 3 pin connector for easy replacement and comes with 10 meters of shielded cable.
For operation at low temperature the sensor can be supplied with a built in heater The Anemometer can be supplied with a 20W 24 V DC built in heater for operation at low temperatures.
Note : These specifications are likely to change without notice.
| Wind Direction Sensor |
Wind Vane. |
| Sensing |
Vane coupled to linear endless potentiometer. |
| Starting threshold |
Better than 0.5 meters/sec. |
| Range |
0 to 357 degrees (3 degrees electrical gap in the Potentiometer |
| Output |
0 to 5 kilo-ohm resistance ( 0 to 357 degrees). |
| Resolution |
1 degree. |
| Accuracy |
+/ 3 degrees. |
| Operating Temperature |
40 to + 60 degree Celsius |
Construction of sensor body : Brass housing, stainless steel shaft and aluminum vane
Principle of OperationDWD 8601 wind vane is a counter balanced, low threshold wind vane. A Linear, wire wound endless potentiometer is coupled to the vane by an SS shaft. As the vane turns, it rotates a stainless steel shaft which is coupled to the potentiometer. This potentiometer has excellent linearity, very low starting torque.
The north of the wind vane is marked on its body. This line is to be aligned with actual North with the help of prismatic compass, at the time of installation. Sensor gives minimum resistance at North (i.e., 0 degree approximately 20 ohms ). The resistance output linearly proportional to the position of the wind vane
Temperature and Humidity Combined Sensor
Model No. DLTH 8702| Temperature | - |
| Sensing | RTD PT100 |
| Range | 40 degrees to + 60 degrees Celsius. |
| Resolution | 0.1 degrees Celsius. |
| Accuracy | + 0.2 degrees Celsius. |
| Output | 0 to 1V for -40 to +60 Deg C |
| Weather Shield | Weather shield coated with weather proof reflective white paint. |
| Size of body | 200(H) x 150 mm diameter(with weather shield). |
| Housing | The sensor is mounted on a brass/SS/ Plastic stem with a flange to fit in to the weather shield |
| Power requirement | 5V DC |
The sensor used for measurement is an RTD ( PT 100). Here the resistance of the element varies with temperature (increases with temperature), approximately 0.39 ohms/degree Celsius. Output is 0 to 1 Volt corresponding to -40 to 60 deg C
HumidityPrinciple of OperationHumidity sensor features an improved design to provide highly accurate and rapid measurements. The humidity sensor is a thin film capacitor element. A dielectric polymer absorbs water molecules from the air through a thin metal electrode and this causes a capacitance change proportional to humidity.
Rainfall Sensor : Model No.DTR 8104
| Sensor | Tipping bucket rain gauge. |
| Sensing | Magnet and reed switch (on-off output). |
| Resolution | 0.5 mm. |
| Accuracy | better than + 5% |
| Operating Temperature | 40oC to +50oC. with built in heater (optional) |
| Rim diameter | 203 mm. |
| Collecting area | 325 mm2 |
| Material | Rain gauge shell made of FRP. Bucket made of stainless steel and mounting assembly of powder coated brass. (SS316body optional) |
| Capacity | Unlimited. |
| Sensitivity | 0.5 mm or, 0.2 mm (rainfall per pulse) |
It uses a tipping bucket mechanism to produce a contact closure every time it receives a predetermined quantity of rainfall. The body and funnel are made of FRP (Fiber glass Reinforced Plastic), rim is made of gun metal. All parts having contact with water are made of stainless steel. Each tip of the bucket produces an on-off output when the magnet passes over the reed switch.
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Hind Electrical Co. (Hind Electrical Co.)
123,Heena Arcade, GIDC Char Rasta, Vapi, City -Vapi State- PIN-396 191., Gujarat - 396191
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