Radiometer for Low and Medium Power Lasers
The X93 (Xnine three) meter is a compact lightweight radiometer for the measurement of Laser Power and Laser Power Density in W and W/m² within the wavelength range from 400 to 1100nm.
7mm Diameter Light Detection Area
The detector LP-9901-4 offers a low profile 8mm height housing with 7mm diameter measurement window for the measurement of laser power in mW and power density in mW/m². A 100mm long handle assists safe placement of the detector head in the measurement zone. Its power range varies with wavelength with a maximum of 100mW at 633nm.
50mm Diameter Integrating Sphere
The ISD-5-Si-4 (formerly model LP-9910-4) is built with a compact 50mm diameter integrating sphere with 12.5mm measurement port and a silicon photodiode detector. The +/-45° acceptance angle enables measurement of lasers and laser diodes with dispersed beams and reduces the need for perpendicular alignment of the laser to the detector.
Integrating Spheres Avoids Regular Reflection
The integrating sphere disperses the incoming laser beam which avoids resonance in the laser chamber a problem with plane detectors with reflective surface that can reflect the beam back into the laser chamber.
Traceable Calibration
Both detectors are calibrated for spectral sensitivity from 400 to 1100nm in 10nm wavelength steps as well as for power density. The calibration is traceable to international standards.
Simple to Use
The X93 meter is a handheld battery operated meter with 9 mm high character LCD display for easy viewing. Operating the X93 is simple. Hard-shell case is optionally available.
Custom Labeling Welcome


Specification | |||
Design | Compact size hand-held housing |
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Display | 6 character LCD, Character height 9mm. Indication of measurement quantity in W and W/m², cw or peak measurement mode, stop, battery low |
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Detector interface | ITT (-4) type connector. |
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CW | Continuous Mode with Run / Hold function (Snapshot) / Manual & Automatic Gain Selection |
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CW integration time | 500 ms |
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Frequency Range | 0.166 Hz to >300MHz |
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spectral range | Menu selected with arrow up and down |
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Measured Quantity | Menu selection of radiant power (W) and irradiance (W/cm²) |
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Parameter adjustment | Via RS232 interface |
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Front panel control | 3 button system |
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Interface | RS232, 9600 Baud, 8 8D pin plug Hirose type 3260-8S1, Power supply option recommended for remote control operation |
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temperature range | Operation 5 to 40°C, Storage 0 to 50°C |
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Power Supply | 9V one-piece battery, operating time about 100 hrs |
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LP-9901-4 1) | Radiant Power and Irradiance detector |
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spectral responsivity | 400 to 1100nm, Wavelength depending sensitivity, Calibration in 10nm increments and the laser wavelength 441, 458, 473, 488, 496, 514, 532, 543, 568, 594, 612,633, 647 and 1064nm |
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Active Area | 12.7mm diameter |
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ISD-5-Si-4 1) | Radiant Power detector with 50mm dia integrating sphere |
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compatible |
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compatible |
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Warranty | 12 month |
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100mW with 0.00002mW display resolution at 633nm |
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1) | For more specifications please check the LP-9901 and ISD-5-Si detector datasheet |
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2) | The measurement range may be limited by the detectors operation temperature |
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Measurement range | NULL | ||
Measurement modes | NULL |
Produktname | Product Image | Description | Show product |
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LP-9901 | ![]() |
Detector head to measure LASER radiant power in W and LASER irradiance in W/m². Features: Low height detector with 7mm dia active area, 400 to 1100nm, for the usage with optometers and signal amplifiers, calibration certificate. |
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ISD-5-Si | ![]() |
Integrating sphere detector for Laser power in W. Features: 50 mm dia, 12.5 mm dia port, BaSO4 coating, 400 nm - 1100 nm responsivity, for the usage with optometers and signal amplifiers, Calibration certificate |