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Select the right product for your needs:
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Synchronous Devices for Measurement
The SDMs are a group of addressable peripherals that expand the datalogger's output
and measurement capabilities. The datalogger controls the SDM output device by storing
a value in a memory location which is then used by the SDM to set a voltage or relay.
Measurement devices store data from sensors which are regularly read into the datalogger
through a control port.
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Serial Data Interface
Serial Data Interfaces are used to connect "smart sensors", specifically those with
serial communications capability, to a datalogger. The datalogger processes and
stores data from the sensor and issues commands to the sensor.
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Multiplexers
Multiplexers allow our CR800, CR1000, CR3000, CR5000 and CR9000 dataloggers to measure
more sensors. The number of analog inputs is increased by sequentially multiplexing
sensor leads into "common" leads. The individual common leads are connected to datalogger
analog inputs, excitation channels, or ground as required by the sensor. The datalogger
controls the multiplexer using two control ports or one control port and one excitation
channel.
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Relays
Relays can provide power directly to external devices that have modest power requirements,
such as the small fans used in our Bowen ratio systems. Alternatively, these relay
drivers can provide control signals to heavy-duty external relays that in turn can
control power to heavy-duty, high-power equipment such as ventilation fans, aquacultural
aerators, refrigeration units, or other electrically powered machinery.
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Terminal Input Modules
These simple modules are small peripherals that provide completion resistors for
resistive bridge measurements, voltage dividers, and precision current shunts. The
modules attach directly to the datalogger's input terminals. Each input module provides
circuitry to connect one sensor, except for the voltage dividers which can connect
up to two single-ended sensors.
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