- Home
- Companies
- Meteolabor AG
- Products
- Meteolabor - Model IS - Sensor ...
Meteolabor - Model IS -Sensor Interface
The IS sensor interface allows the measurement of signals from simple meteorological sensors, such as rain gauges, sunshine detectors, global radiation meters and photometers, thermistor and PT100 thermometers. The measurements are recorded in the internal data storage together with a `time-tag`. Control of the data processing and the calling up of stored data is by means of an RS232 or an RS485 interface. The RS485 version allows several instruments or other sensors manufactured by meteolabor ag to be driven using a sensor bus.
Radiation measurement
Output voltages of the pyranometer (e.g. 0... 12 mV) are amplified and used to drive a VCO (Voltage Controlled Oscillator). The number of impulses per minute emanating from the VCO are counted. This procedure is excellent for suppressing any noise on the sensor leads.
Rain gauge
The rain gauge generates an impulse each time a given amount of rain has been collected. These impulses are counted and totaled.
Sunshine duration
There are various sensors currently on the market. One type generates an impulse each second that sunshine is detected. Another type produces an output voltage of 1 volt as long as the sun is shining. Data from both types of sensors are processed using the IS sensor interface.
Temperature and brightness measurement
In the case of the PT100 sensor a holding wire current of exactly 1mA is generated. The voltage at the resistor is measured using the 4-lead technique in conjunction with a AX-AD converter.
The voltage of the YSI thermistor (VT3) and the photometer (HG34, HG1> are also measured using A£-AD converter.
We would be pleased to discuss your individual requirements for sensors and installation of equipment, solve any special measurement problems you may have and adapt the software to suit your needs.
- sensor interface IS-RS232
- sensor interface IS-RS485