L202 Illuminance & Luminance Photometer

The hugely popular Irradian L202 digital radiometer is designed for accurate measurement of illuminance and screen luminance at low cost and has been utilised extensively by medical systems engineers worldwide. With simple, straightforward functions and designed with the user in mind, operations such as the automatic sensing and calibration of the chosen detector head mean that the meter has application into any area requiring reliable, affordable, easy measurement.

L202PMS Brochure




L201 Illuminance Photometer

The L201 illuminance photometer offers lower cost combined with a high accuracy photopic illuminance detector. The operating range of 0 to 19,999 Lux makes the L201 suitable for most indoor office and industrial lighting applications. Other measurement ranges are available including calibration in footcandles.

L201 Brochure




L203 Illuminance & Luminance Photometer

The L203 photometer is supplied with accessories for both luminance and/or illuminance measurements.

With the large measurement range of 0.0001 to 199 990 the photometer is suited for many applications including emergency / escape route lighting and other low light applications.

Key features include auto or manual ranging, backlight LCD display, switching between lux and footcandle or cd/m² and footLambert, computer interface, averaging and integration, maximum and minimum values.

This meter is supplied with a handbook, traceable calibration certificate, hard carry case, spare battery, blanking cap as standard with an optional USB / RS232 communications cable.


L203 Brochure




Spot Measuring Accessory

Applications requiring luminance measurements on small areas, small sources or distant sources require the addition of the spot measuring accessory fitted to the photometer's photopic detector. The SMU203 has a choice of 25mm 50mm and 100mm 'C' mount lenses and extension tubes giving a variety of spot sizes and fields of view.

SMU203 Brochure




Q201 Quantum PAR Radiometer

The Irradian portable digital quantum radiometer model Q201 is a versatile, direct reading instrument designed specifically for measuring photosynthetic active radiation (PAR) over the spectral range 400 to 700nm, in units of µmol / m² / s (or alternatively in units of micro Einstein / m² / s ).

The operating range of 0 to 1999.9 µmol / m² / s makes the Q201 suitable for sunlight and controlled environment chamber measurements.

The radiometer comprises of a handheld display unit with battery, detector and integral amplifier, with interconnecting cable. The meter also includes a calibration certificate and carrying case for protection and transportation.

The Q201 PAR radiometer offers lower cost combined with an Irradian high accuracy PAR response, cosine corrected detector.

The Q201 may be used in applications such as Agriculture, Horticulture, Plant Growth studies, Biology and Liminology (with under water detectors).

A handbook and brochure for this meter are available here.

Other measurement ranges are also available, please contact Irradian for details.

Q201 Brochure




Q203 Quantum PAR Radiometer

The Q203 radiometer has a laboratory detector with up to three interchangeable filter rings for PAR and radiometric (400 - 1000nm) irradiance measurements and a photopic filter ring for illuminance (Lux) measurements.

The microprocessor control within the display unit features auto or manual ranging, and has special functions for recording the average, minimum and maximum light signals from unstable sources. Other features include a RS232 serial port for connection to a PC.

The Q203 radiometer can also be supplied with waterproof detector housing for absorption measurements in the water column. The signal instability due to the surface wave effect can be minimised by using the averaging special function on the radiometer.

Q203 Brochure




UV201 Ultraviolet Radiometer

The UV201 radiometer is typically used on high intensity sources to give fast and accurate measurements of UV irradiance in industrial applications.

An adaptor is also supplied to position over the detector the tip of a Series 300 liquid light guide from a spot curing source such as Irradian's Flexicure.

A range of detectors covering bands in the ultra violet and blue regions of the spectrum are available for use with the UV201 radiometer.

UV201 Brochure




R203 Radiometer

Most drugs and pharmaceutical compounds are required to be tested for their photostability under prolonged exposure to visible and ultra violet light.

Additionally, when using fluorescing dyes in crack detection the ambient visible light levels and the intensity of the ultra violet source have to be controlled.

The radiometer model R203UV measures both the illuminance and the UVA irradiance and is supplied with Irradian's laboratory detector, a high accuracy photopic filter ring and a UVA filter ring.

Key features of the microprocessor controlled radiometer include minimum, maximum and average signal measurements, autoranging and a RS232 link for remote control and data logging.

An illuminant 'A' source is used for the photometric calibration.

To facilitate the UVA measurement the radiometer can be calibrated under a specific light source to match the UVA irradiance measurement of an Irradian SR9910 double-monochromator spectroradiometer. Alternatively, a choice of sources and further techniques are available for the ultra violet irradiance calibration in order to suit the users requirements.

Contact Irradian for further details.

R203 Brochure




UV203 Ultraviolet Radiometer

The versatile UV203 ultra-violet radiometer has a laboratory detector with up to three interchangeable filter rings covering selected bands of the ultra-violet spectrum.

The microprocessor control within the display unit features auto or manual ranging, RS232 communication to a PC and special functions for integrating the signal or recording the maximum, minimum and average signals.

The laboratory detector has an integral multiple gain range amplifier with signal digitising providing high sensitivity and low noise measurements.


UV203 Brochure




UV202 Ultraviolet Radiometer

The prolific use of sun tanning ultra violet sources has created the requirement for a radiometer that has the ability to measure the output from a variety of different sources and also indicate if there is an incorrect lamp fitted.

To achieve this the UV202 has a different set of calibration factors for up to five types of tanning lamps. In addition the measuring head has both a UVA and a narrow band UVB3 sensor within the probe. Selection between the two sensors and the lamp types is through the front panel key switches.

UV202 Brochure




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