PR203 PHOTOTHERAPY
RADIOMETER
Designed to measure directly
from multiple types of blue light
source for use in the treatment of
hyperbilirubinaemia in newborn
babies.
PR203 RADIOMETER
The Irradian portable phototherapy radiometer
(model PR203) is designed specifically to
measure the spectral irradiance from multiple
blue light sources which are used for the
treatment of hyperbilirubinaemia in new born
babies. The radiometer comprises of a hand
held, battery operated, illuminated display unit,
a small detector and a connecting cable. The
detector is carefully constructed to give an
optical response that closely matches the
absorption curve of bilirubin; that prevents the
measurement of non-therapeutic light and that
allows accurate measurements of three
different types of light sources, where ever
they are placed with respect to the radiometer.
The sensor used in the detector is a silicon
photodiode which performs with excellent
linearity and long term stability.
OPERATION
The detector is placed in the exposure chamber
or incubator at a predetermined distance from
the lamps. The radiometer display is switched
on and zeroed using the supplied blanking cap.
The appropriate light source setting is selected
on the front panel and the spectral irradiance
of the source is read directly in units of
µW/cm²/nm. The data on the display can be
locked at the measurement value, and a special
function mode allows easy determination of the
Average, Maximum and Minimum stored
values. Dosage or exposure in units of
µJ/cm²/nm can also be read using the
Integrate function. Remote meter operation is
possible using an optional computer interface
cable.
FEATURES
• Compact and robust.
• Direct reading of
incandescent, fluorescent &
LED phototherapy sources.
• Low noise, high accuracy
detector amplifier.
• Response tailored to the
absorption of bilirubin.
• Accurate detector directional
response.
• Four decades of auto-ranging
sensitivity.
OPTIONS
•
•
•
•
Calibration service.
Computer interface cable.
Detector extension cable.
User reference handbook.
Irradian Ltd. Digital Phototherapy Radiometer Model PR203
SPECIFICATION
The Irradian digital phototherapy radiometer comprises of a microprocessor controlled display unit with
battery, detector with integral amplifier, blue glass filter and cosine diffuser, calibration certificate, user
guide, blanking cap and carrying case.
DISPLAY UNIT
DETECTOR
Model:
PR203
Model:
DET203450
Design:
Portable microprocessor controlled
meter with backlit 4½ digit LCD, auto
or manual ranging, simple keypad
operation, battery powered.
Optional RS232 remote operation.
Design:
GaAsP
photodiode
with
integral
amplifier and signal to frequency
converter. Aluminium housing with
blue glass filters, cosine diffuser and
1.0 m cable.
Ranges:
Four discrete ranges;
0 - 19.999, 0 - 199.99, 0 - 1999.9,
0 - 19999 μW/cm²/nm
Linearity:
Better than ± 1% through ranges.
Spectral Response:
Refer to figure above.
λpeak @ 450 ± 5 nm
FWHM = 53 ± 5 nm
Angular Response:
Cosine error ≤ ± 5% to 70° from
normal incidence.
Dimensions:
38 mm Ø x 39.5 mm high.
Accuracy:
± 1%, ± 1 digit on display.
Keypad Operations:
Power on / off action, Zero stores offset
for subtraction from subsequent
readings, Manual or auto ranging gain
control, Average, Maximum, Minimum
and Integrate functions.
Display:
4½ digit LCD, 10 mm high numerals.
Power Supply:
PP3 battery.
Operating life 30 to 50 hours.
Calibration:
The PR203 is separately calibrated
against three different light type
sources; incandescent, fluorescent and
LED
using
a
spectroradiometric
calibration technique over the spectral
range 425 nm - 475 nm† traceable to
NPL optical metrology standards.
Absolute calibration accuracy ± 7.5%
Dimensions:
80 mm x 45 mm x 150 mm
Weight:
Approximately 0.4 kg
†
Official Journal of the American Academy of Pediatrics: Management of
hyperbilirubinemia in the newborn infant 35 or more weeks of gestation.
Subcommittee on Hyperbilirubinemia, Pediatrics 2004;114;297-316.
IRRADIAN Ltd.
9 Elphinstone Road
Tranent
East Lothian
Scotland EH33 2LG
PR203_C.ppp Revision 16 11/2013
Telephone: +44 (0)1875 898-083
Facsimile: +44 (0)1875 616-528
E-mail:
info@irradian.co.uk
Web:
www.irradian.co.uk
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