Optical Power and Energy Meter, Dual-Channel Benchtop Console
|Compatible Sensors||Photodiode, Thermal, and Pyroelectric|
|Number of Channels||2|
|Optical Power Range*||100 pW to 200 W|
|Optical Energy Range*||3 µJ to 15 J|
|Available Sensor Wavelength Range*||185 nm - 25 μm|
|Display Refresh Rate||20 Hz|
|Bandwidth*||DC - 100 kHz|
|Photodiode Sensor Range**||100 nA - 10 mA|
|Thermopile Sensor Range**||1 mV - 1 V|
|Pyroelectric Sensor Range**||100 mV - 100 V|
**Ranges Selectable in Watts (Photodiode and Thermopile) or Joules (Pyroelectric) and is dependent on the sensor used.
- Dual-Channel Power and Energy Meter Benchtop Console
- Over 25 Compatible Sensors
- Large Graphics Display
- Advanced Display and Measurement Features
- Programmable Channels: Monitor, Difference, Ratio, Math Functions, Linear and Log Values, Attenuation
- USB 2.0 Interface and Software Suite
- Continuous and Single-Shot Energy Measurement of Pulsed Laser Sources
Thorlabs’ Dual Channel PM320E Power and Energy Meter offers many feaures not found in handheld devices. It is ideal for precise optical measurements, laser and photodiode characterization, lifecycle measurements and many more applications in the lab and on the manufacturing floor.
The dual-channel design enables differential and ratiometric measurements. Intuitive manual operation with the large graphics display, compatibility to conventional photodiodes, and excellent remote capabilities enable easy system integration.
The PM320E is compatible with all Thorlabs Photodiode Sensors (dual-channel) and Thermal Sensors (single channel only) and allows the connection of unamplified anode or cathode grounded photodiodes with up to 10mA photocurrent and thermal elements with up to 100 mV output voltage.
Additionally the PM320E offers energy measurements with all Thorlabs Pyroelectric Energy Sensors (both channels). More information can be found in the Sensor Compatibility tab and the Power Meter Compatibility Chart.The PM320E is sold as a single benchtop device with the sensors available separately. Please see Thorlabs' complete line of sensors below.
The calibrated sensors connect via two sub-D connectors on the rear panel, which also provides two analog high bandwidth outputs to allow monitoring of each channel, plus the programmable analog output. Optional user-supplied photodiodes connect via two BNC inputs on the front panel, which feature switchable bandwidth and a programmable bias voltage. The input can be switched between the front and rear connectors. The additional BNC output is gain-and-function programmable. It provides an analog voltage proportional to the output of one of the channels or as a difference or ratio of the two power meter channels. The measurement resolution is 16 bit for all power ranges. The PM320E are controlled locally via the front panel, which features a large 240 x 128 pixel LCD display, or remotely via USB 2.0.
In addition to the console, the following comes with each purchase: Software CD ROM, LabVIEW™ and LabWINDOWS™ /CVI Driver Set, Certificate of Calibration, and Operation Manual.
The PM320E Console is compatibile with all Thorlabs' Power and Energy Sensors. A complete list of these sensors is shown below. For more information on previous generation sensors and consoles, please see the Sensor Compatibility tab or contact tech support.
|Display Type||Graphical LCD 240 x 128 pixels|
|Display Screens||Numerical, Bargraph, Linegraph, Statistics, Simulated Analog Needle|
|Viewing Area||3.7" x 2.4"|
|Refresh Rate ||20 Hz|
|Compatible Sensors||All Photodiodes, Thermopiles, and Pyros|
See below for full sensor specs
|Input Connection||2x DB9, Rear|
2x BNC, Front
|Trigger Connection||BNC, Rear|
|Connector||2x BNC, Rear|
|Signal||Ch1, Ch2 Amplified Input Signal|
|Voltage Range||0 to ±10 V|
|Bandwidth||up to 100 kHz, Dependent on Sensor and Settings|
|Programmable Analog Output|
|Signal||Selectable: Ch1, Ch2, Ch1-Ch2, Ch1/Ch2|
|Voltage Range||0 to ±10 V|
|Bandwidth||up to 500 Hz, Dependent on Sensor and Settings|
|Connector / Interface||USB, Rear / USB 2.0|
|Line Voltage||100 / 115 / 230 V (-10%, +10%)|
|Line Frequency||50 to 60 Hz|
|Dimensions and Mounting|
|Dimensions (LxWxH)||220 mm x 122 mm x 325 mm|
|Operating Temperature||0 to 40 °C|
|Storage Temperature||-40 to 70 °C|
Sensor Compatibility Specs
|Detector Compatibility||Photodiode Sensors:|
Photodiodes (Max 10 mA)*
Thermopiles (Max 100 mV)
Pyros (Max 100V)
|Input||Ch1, Ch2 / DB9, Rear / BNC, Front||Ch1, Ch2 / DB9, Rear||Ch1, Ch2 / DB9, Rear|
|Measurement Ranges||6 Decades; 100 nA - 10 mA|
Ranges Selectable in W,
|4 Decades; 1 mV - 1 V|
Ranges Selectable in W,
|4 Decades; 100 mV - 100 V|
Ranges Selectable in J,
|Wavelength Ranges||200 nm - 1800 nm||190 nm - 25 μm||185 nm - 25 μm|
|Power / Energy Ranges||100 pW - 20 W||100 μW - 200 W||10 μJ - 15 J|
|Units||W, dBm, W/cm², A (Photodiodes only)||W, dBm, W/cm²||J, J/cm², W, W/cm² |
|Accuracy||±0.2% of Full Scale (1 µA - 10 mA) |
±0.5% of Full Scale (100 nA)
|±0.5% of Full Scale||±0.5% of Full Scale|
|Display Resolution||10 pA / Responsivity Value (A/W)||1 µV / Responsivity Value (V/W)||100 µV / Responsivity Value (V/W)|
|Bandwidth||DC - 100 kHz, Dependent on Sensor and Settings||DC - 10 Hz, Dependent on Sensor and Settings||3 kHz (Max. Rep. Rate)|
|Wavelength Correction||Sensor Dependent; nm (A/W)||Sensor Dependent; nm (V/W)||Sensor Dependent; nm (V/J)|
*Compatible with Anode Grounded and Cathode Grounded photodiodes and bias voltages of 0 to ±10 V.
For a full list of the sensor head specifications please visit the Photodiode Power Sensors, Thermal Power Sensors, or Pyroelectric Energy Sensors pages. For other information, please contact tech support.
| ||Power Meter Consoles|
|Standard Photodiode Sensors|
|Slim Photodiode Sensors|
|Integrating Sphere Photodiode Sensors|
|Fiber Photodiode Sensors|
| ||Power Meters Consoles|
The PM320E console is compatible with more than 25 photodiode, slim photodiode, integrating sphere, fiber, thermal, and pyroelectric sensors covering the UV to the MIR. Additionally an unamplified anode or cathode grounded photodiode, with up to 5 mA photocurrent, thermal elements with up to 1 V output voltage, and pyroelectric sensors with max. 100 V output may be interfaced with the PM100D. Depending on the application the sensor can measure optical powers in the range from 100 pW to 200 W and energy from 3 µJ to 15 J.
Please see the Applications tab for common sensor arrangements. Please see the Power Meter Compatibility Chart for information about using new and old sensors with the PM320E and other Thorlabs power meters.
Power and energy density can be displayed based on user input beam areas. Optical sources may be attenuated / gained electronically through the console. Note: Attenuating the source through the console will not attenuate the light at the detector and damage may still occur above the detector threshold power.
Thorlabs' complete line of Sensor Heads are shown below. Utilizing the variety of sensors, the PM320E can measure optical power and energy from CW and pulsed sources. Sensors are available for monitoring low power CW laser diode emission to high power excimer, YAG, and CO2 laser pulses.
Additionally, the PM320E communicates with the sensor and accesses spectral response functions, time constants, and other information specific to the detector. The PM320E then corrects for spectral response functions automatically. The power meter also accounts for the detector time constants (which can vary greatly, especially for Thermal sensors) for each sensor and can minimizes the response time of the system (sensor + console), thus greatly improving the efficiency of the unit.
Sensor Upgrade Service
Thorlabs' Sensors and PM320E Console are not compatible with old power meter consoles and sensor heads, respectively. We offer a sensor upgrade service if you want to use your existing sensors with a new power meter console. Note: upgraded sensors will be incompatible with old power meter consoles and new sensors converted to work with older consoles will not be compatible with the PM320E. Please contact our tech support team for details.
Sensor Head Compatibility Chart
Thorlabs has been expanding and improving on its power meter consoles and sensor heads over the past several years to meet the demanding needs of our customers. Sometimes this creates compatibility issues. The chart to the right shows compatible and incompatible sensors and consoles. A complete compatibility chart showing all Thorlabs' current and former generation sensors and consoles is also availalble here.
S150C Sensor with FC and SMA Connectors (Click to Enlarge)
Standard Photodiode Sensor Mounting Options
Thorlabs Standard Photosdiode Sensors compact design allows easy integration into existing setups. Typical mounting configurations including post, cage, and lens tube options are available. Shown on this page are several different choices for mounting these sensors.
The Standard Photodiode Sensors are compatible with all S120-xx Series fiber adapters. FC/PC and SMA adapters are shown on the right. Adapters for SC, LC, and ST connections are also available.
Flip up mounts are convenient for quick power measurments from a static location. The sensor can be placed in the path of the laser beam for the power measurment and flipped down during normal operation of the system.
FM90 Right Angle Flip-Mounts are shown to the right. Thorlabs also offers the TRB1 Articulating Post Mount. The lockable articulating mount offers almost unlimited positioning of the sensor head. The articulating mount is shown on an S13xC Slim Photodiode Sensor below.
The Standard Photodiode Sensors also feature SM1 threaded connections on the front face. The SM1 theading provides easy mounting to 1" lens tube systems and quick release mounts.
Shown to the right are the KB1P Quick-Release Post Mount and QRC1A Quick-Release 30 mm Cage Mount. Both mounts feature SM1 threaded connections to the sensor heads.
Note: Due to the thickness of the S12xC sensor, the QRC1A and CP90F (shown below) quick release mounts can only be fully removed from the cage system by backing them off an open end. The two mounts are easily removed from the cage system if only three cage mounts are used. See the picture on the right.
Thorlabs also offers the CP90F 30 mm Cage Plates with Quick-Release Mounts. These mounts feature magnetically coupled mounting for easy and repeatable mounting.
Note: Like the QRC1A, the CP90F can not be removed from a closed cage system.
Slim Photodiode Sensor Mounting Options
Thorlabs' Slim Photodiode Sensors are designed to fit into tight optic arrangements such as cages, lens tubs, and optic dense free space arrangements.
Shown to the right is a S130C Sensor inserted into a 30 mm cage system. The application shown highlights the ease for which the sensor can be inserted into the cage, and the minimal space needed to take a power measurment.
The Slim Photodiode Sensors may also be mounted on a TRB1 Articulating Mount. This mount allows repeatable insertion of the sensor into tight optic arrangements. After the measurement is made, the sensor may be rotated out of the beam path for normal operation.
Integrating Sphere Photodiode Sensor Mounting Options
Thorlabs' Integrating Sphere Photodiode Sensor provides a low loss cavity for diverging, non-uniform, or off-axis beam measurements. These integrating spheres are ideal for all fiber based applications due to the beam divergence at the end of the fiber.
Shown to the right is an S140C Integrating Sphere with S120-FC Fiber Adapter. Also shown is an S140C with a S140-BFA Bare Fiber Adapter. The Bare Fiber adapter features a mounting clamp and light shield to decrease interference from ambient light.
Compact Fiber Photodiode Sensor Mounting Options
Thorlabs' Compact Fiber Photodiodes are the ideal choice for a portable, fiber coupled power meter. The S15xC sensors are compatible with a wide variety of fiber connections. PM20-xx adapters are available to couple FC, PC, SC, LC, SMA, and ST connectors with the sensors. Shown to the right is a S150C Sensor with FC and SMA connector adapters.
Shown to the far right is a PM100D console with S150C sensor connected to a FC connectorized optical fiber. This setup is ideal for portable in the lab and in the field use.
Pyroelectric Energy Sensor Mounting Options
Thorlabs' Pyroelectric Energy Sensors are ideal for measuring pulsed sources. These pyroelectric sensors provide direct energy readings for those sources. The sensors are designed to handle medium to high energy pulses from Excimer, YAG, and other high power lasers.
Mounting options include post (with insulating adapter) and cage configurations, shown to the right.
This series is provided with a software package including drivers for LabVIEW™ and LabWindows™.
To download the latest version of this software please click the link below.
Use this link to download the below software packages:
- Applications: Standard application-software packages and graphical user interfaces .
- Drivers: Instrument drivers for the National Instruments™, LabWindows™/CVI and LabVIEW™ development environments.
- Firmware: Low level software for the internal operation of the device.
- Utilities: Software tools for general use.
|1||+5 V (Drive Max. 50 mA from this Pin)||5||Pyro-Electric Sensor +|
|2||EEPROM Digital I/O||6||DGND|
|3||Photodiode Ground (Anode), Thermal and Pyro Sensor Ground||7||PRESENT Connect this Pin via a 1 - 10 kΩ Resistor to Pin 3 (AGND)|
|8||Thermal Sensor +|
|4||Photodiode Cathode||9||Not Connected|
0 ... ± 10 V, Min Load 10 kΩ
4 mm Banana Jack
TTL, Max Frequency 1.5 kHz
Programmable Analog Output
0 ... ± 10 V, Min Load 10 kΩ
USB Type B
USB Type B to Type A Cable Included