Transducers for photodiodes
Photodiodes convert incoming electromagnetic radiation into electrical charge carriers. If photodiodes are short circuited an electrical current (photocurrent) proportional to the incident radiation intensity (number of photons per second) is induced. These photocurrents are generally small and cover the range from femtoampere (fA) to microampere (µA). Signal transducers transform this weak photocurrent to robust standard signals for reliable data transmission and simple data acquisition.
The voltage which is present on the open pins of a photodiode without a short circuit (photovoltage) can be easily measured with a voltmeter but is strongly non-linear correlated to the radiation intensity and thus not very useful for the measurement thereof.
The transducers developed by sglux employ transimpedance amplifiers which short the photodiodes and therefore provide a linear relationship between the incident radiation intensity and the output signal.
We offer analogue transducers with voltage output „VOLTCON (0 … +4V)“, „Multiboard (0 … ±4 V)“, „Digiboard (0 … ±3 V)“ and „Radikon (0 … +10 V)“ and current loop output „AMPCON (4 … 20 mA)“.
Furthermore we produce digital transducers which convert the photocurrent into digital representation transmitted to a computer via USB (Digiprobe, SGCD4). These transducers offer an increased dynamic range compared with the analogue transducers.
To control industrial UV applications our „SENSOR MONITOR 5.0“ supports multiple functions such as limit control, dosage control, lamp monitoring.
Showing all 10 results
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VOLTCON
Transducer photocurrent-to-voltage 0 - 5 V, four different measurement ranges available: 500 pA, 50 nA, 5 µA and 500 µATransducer photocurrent-to-voltage 0 - 5 VProduct Description- transducer photocurrent-to-voltage 0 – 5 V
- maximum photocurrent: 500 µA, 5 µA, 50 nA or 500 pA
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AMPCON
Transducer photocurrent-to-current 4 – 20 mA, three different measurement ranges available: 25 nA, 2.5 µA and 250 µATransducer (current amplifier) with output current 4 to 20 mAProduct Description- transmitter (current amplifier) with output current 4 to 20 mA
- to include photodiodes into an industrial 4 to 20 mA data bus
- maximum photocurrent: 250 µA, 2.5 µA or 25 nA
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Multiboard (TW-MF2CAB)
Two-channel photocurrent-to-voltage transducer 0 – 4 V, jumper selectable measurement ranges from 400 nA to 40 µA. Best suited for experiments where the photocurrent to be measured is yet unknown. Universal dual channel photodiode transducerProduct Description- universal dual channel photodiode transducer
- measuring range from 400 nA range up to 400 µA
- versatile configuration possible
- well suited for experimental setups and small series
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Digiboard
Transducer for the conversion of a photocurrent to a voltage of 0 - 3 V or a photocurrent to a frequency. The programmable limit switch with hysteresis allows the Digiboard to be used as a simple controller unit. The measurement ranges from 300 nA to 30 µA can be configured by jumpers. A potentiometer allows trimming of the voltage output to a defined value. The frequency output offers a high dynamic range of 6 decades.Versatile dual channel current to voltage converting amplifierProduct Description- versatile dual channel current to voltage converting amplifier
- one analog and one frequency output
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SGCD4
The SGCD4 is a switchable gain photocurrent digitizer that converts small DC currents (e.g. generated by photodiodes) into digital values transmitted via USB to a computer for displaying and recording. Four different current measurement ranges are user selectable by software. The device is delivered with a PTB traceable current calibration.switchable gain photocurrent digitizer, converts small DC currents into digital values, different current measurement rangesProduct Description- switchable gain photocurrent digitizer, converting small DC currents (e.g. generated by photodiodes) into digital values transmitted via USB to a computer for displaying and recording
- four switchable gain levels
- no specific previous metrological knowledge needed
- delivered with a PTB traceable current calibration
- low noise cable available on request
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Mounted photodiode
Photodiode in housing with BNC connectionPhotodiode in housing with BNC connectionProduct Description- Photodiode in M12x1 housing with BNC connection
- Suitable for all sglux UV photodiodes
- A mounting plate for optical benches is optionally available.
- An integrated shunt resistor is optionally available, resistance value according to customer specifications.
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RADIKON-simple
The Radikon-Simple bases on a VOLTCON or AMPCON and comes with a rugged shielded housing with BNC connector.External amplifier box to convert the photocurrentProduct Description- external amplifier box to convert the photocurrent of photodiodes or the sglux UV-Cure-HT sensor
- signal output 0 – 5 V, 4 – 20 mA or USB
- the gain is configured customer-specifically
- the module is also available with calibration
- robust, shielded housing with BNC input
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SENSOR MONITOR 5.0
Measuring and control module for monitoring and automation of irradiation processes. The device provides the display of irradiance and dose information for up to two UV sensors as well as three programmable relays for control of multi-stage irradiation processes.Measuring and control module for monitoring and automation of irradiation processesProduct Description- measuring and control module for monitoring and automation of irradiation processes
- indication of radiation, dose and status information
- three programmable relays for automation of single- and multi-level irradiation processes
- optional with two measuring inputs and USB/RS232 output
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Photodiode Amplifier Dual
The Photodiode Amplifier Dual is based on the Multiboard and comes with a rugged shielded housing, well suited for experimental setups.Two-Channel Photocurrent AmplifierProduct Description- two-channel photocurrent amplifier
- conversion of photocurrent into a 0 … 5 V output signal
- maximum photocurrent: 100 pA … 40 µA
- suited for experimental setups in measurement laboratories
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Photodiode Amplifier Connect
The Photodiode Amplifier Dual is based on the Digiboard and comes with a rugged shielded housing, well suited for experimental setups.Photocurrent amplifier with integrated relay outputProduct Description- photocurrent amplifier with integrated relay output
- conversion of photocurrent into a 0 … 5 V output signal
- maximum photocurrent: 100 pA … 40 µA
- suited for experimental setups in measurement laboratories
