Explosion-proof Power Meters with Standard Photodiode Sensors

Explosion-proof Power Meters with standard photodiode sensors are ideal for measuring low-power coherent and incoherent sources with wavelengths from 400 to 1100 nm (Si photodiode) or 700 to 1800 nm (Ge photodiode). The NIST-traceable, calibrated sensors features a large Ø9.5 mm active area in combination with a reflective, diffused ND filter enables power measurements up to 50 mW (40mW for Ge photodiode) in free-space and fiber-based applications. A removeable, annular VIS/IR viewing target serves as an aid for centering a beam on the active area of the photodiode. The target absorbs light from 400 to 640 nm and 800 to 1700 nm.

The remotely controlled power meters with standard photodiode sensors have USB interfaces and are offered with a selection of photodiode and thermal power sensors. Each sensor is connected to the USB interface by a standard 1.5 m connection cable.

The power sensor head is designed for general purpose optical power measurements. The head is optimized for small thickness to fit in tight spaces. 

The front face of the power meters with standard photodiode sensors housing is SM1 (1.035"-40) threaded for mounting external optics, fiber adapters, light filters, and apertures. A combined 8-32- and M4-threaded mounting hole on the side of the housing accepts both metric and imperial posts. The meter holds the sensor’s individual NIST- and PTB- traceable spectral calibration data in a non-volatile memory.

Note: To use the Ex Power Meters with standard photodiode in a hazardous area, the device must be protected to at least IP 65, so it must be placed inside the enclosure.

Ex Power Meters with standard photodiode sensors compatible with Windows OS.

The Ex Power Meters with standard photodiode sensor is connected through an industrial USB 2.0 connector to an intrinsically safe barrier Ex USB 2.0.

The Ex Power Meters with standard photodiode sensors have a “hot-plug” function which allows them to be connected and disconnected without stopping, shutting down or rebooting the system.

Specifications:

Detector type: Silicon Photodiode (Si photodiode) and Germanium Photodiode (Ge photodiode)

Wavelength range: 400 - 1100 nm (Si photodiode) and 700 - 1800 nm (Ge photodiode)

Optical power working range: 50 nW - 50 mW, 500 nW - 500 mW (Si photodiode) and 50 nW - 40 mW (Ge photodiode)

Optical power resolution: <1 nW, <10 nW (Si photodiode), <2 nW (Ge photodiode)

Calibration uncertaint: ±3% (451 – 1000 nm), ±5% (Over rest of range) (Si photodiode) and ±5% (Ge photodiode)

Typical Application: Low-Power Lasers

Laser Types: Diode, Diode Arrays, He-Ne, Dye, Ion Lasers (Ar+, Kr+)

Linearity: ±0.5%

Active area uniformity: ±1%

Max Average Power Density: 20 W/cm2 (Si photodiode) and 10 W/cm2 (Ge photodiode)

Optical filter / diffuser: reflective ND (OD1), (OD2) (Si photodiode) and absorptive ND (Schott NG9) (Ge photodiode)

Response Time: <1 µs

Sensor active area: 9.7 mm x 9.7 mm

Sensor aperture: diameter 9.5 mm

Power meter electronics properties

Analog measurement range: 500 nA, 50 µA, 5 mA

Measurement units: W, dBm, A

AD converter: 24 Bit

Analog amplifier bandwidth: 10 Hz

Update rate: 10/s

Remote interface: USB 2.0

Power supply: external: 5 V DC via USB

Dimensions

Sensor head dimensions: diameter 30.5 mm x 12.7 mm

USB housing dimensions: 65 mm x 20 mm x 10 mm

Cable length: 1.5 m

Weight: 0.07 kg

Mounting

Aperture Thread: External SM1 (1.035"-40)

Post mounting: 8-32 and M4 Combined Thread

Supported Operating Systems: Windows

Сompliance: IP 65, RoHS

Electrical Data:

Uo=5 V

Io=50 mА

Ui=5 V

Ii=50 mА

Ci=10 µF

Ex marking:

Ex ib I Mb

Ex ib IIC T6...T4 Gb X

Ex tb IIIC T85°C...135°C Db

Produced in accordance with IEC 60079-0, IEC 60079-11, IEC 60079-31

Operating temperature: 0°C to 40°C

The scope of delivery implies:

Explosion-proof Power Meters with Standard Photodiode Sensors