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Shop: Overview - Instruments - Options - Accessories - Network - Spares
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Light Sensor for Visible Light The light sensor is a factory installed option on top of the SediMeter. The blue-enhanced photo diode sensor is mounted inside a transparent cone, to avoid sedimentation over it. As default it measures light in a linear scale from ca 100 lux to 178 klx. This is equivalent to the range from a livingroom to bright sunlight. The LogDator allows the sensor to be sampled up to 84 times per measurement, with a rate from 0.5 Hz to 50 Hz. |
Item: LM-07-01 Order with: |
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Pressure Sensor: Depth, Tides, Waves The pressure sensor measures the absolute pressure. It may be used to monitor the tide, but also for waves, since the LogDator allows the sensor to be sampled up to 84 times per measurement with a rate of 0.5 Hz to 50 Hz. The SediMeter software can be used to estimate average depth, wave period, etc. The sensor is made from stainless steel. The nominal maximal measurement depth is 14 m. Other ranges are available on request. As standard the data is reported in pascal (Pa), which can be converted to, e.g., meters depth in software, taking into account the site's elevation and water density. For very precise depth measurements a separate LogDator can be used to record the atmospheric pressure with this same sensor. |
Item: LM-08-01 Order with: |
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Bulkhead connector that brings the RS-485 wires to the outside of the SediMeter (or LogDator). They are under-water pluggable. They contain 2 contacts for communication, and 2 for supplying remote power. In real-time monitoring operation, up to 255 devices can be daisy-chained, with cables running from instrument to instrument. The last unit needs one UW connector, the others need 2 each. The photo shows the connector mounted on a standard end-plug. If two are used, they will be mounted horizontally on a long end plug. This option can also be used for downloading data without retrieving the SediMeter or LogDator. A diver would connect a cable from the computer to the instrument, and wake it up for listening using a magnet. After downloading the data he would disconnect the cable and replace the protective dummy plug. |
Item: LM-09-01 Order with: Network: Accessory: Spares: |
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This thermometer will react to temperature changes within seconds, as compared to minutes for the standard thermometer. If ordered with a LogDator it will replace the built-in thermometer in the data, and not occupy any of the optional channels. If ordered with a SediMeter it must be connected as an optional sensor, thus occupying one of the two available optional channels. |
Item: LM-10-01 Order with: |
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Humidity and other custom sensors We can interface a range of sensors to the LogDator, for instance a humidity and air temperature sensor. The ability of the LogDator to take 84 samples at a rate of 0.5 Hz to 50 Hz may be useful in many measurement situations where it is important to know the statistical uncertainty. For instance, data we collected showed that microbursts of air with different combinations of humidity and temperature can cause large variations in the measured humidity over a minute. This short-term uncertainty must be known before draing conclusions about long-term trends. Using the LogDator has a number of benefits, also out of the water. So if you have a sensor in mind for which you need a logger, or an interface to a measurement network, feel free to contact us to discuss it. |
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