Get near-tissue equivalent thermoluminescence dosimetry (TLD) performance with a high-capacity reader for all types of TLD elements and health physics applications. The Thermo Scientific™ HARSHAW TLD Model 5500 Automatic Reader provides unattended operation for up to 50 dosimeters and accommodates TL chips, disks, rods and cubes in a broad variety of sizes. This reader is suitable for all kinds of applications that require TLD detectors. Research applications are: radiation measurement verification, total body irradiation dose measurement, and many others where measurement quality assurance is critical.

The HARSHAW TLD Model 5500 Manual Reader includes a carrier disk for up to 50 TL detectors, a linear, programmable contactless nitrogen heating system, and a cooled photomultiplier tube with associated electronics to measure the TL light output. The operational software, Thermo Scientific™ WinREMS™, which runs on a separate computer, provides the user interface, the reader control and the applications software.

• Multiple, programmable, linear heating cycles including pre-read anneal, acquire and post-read anneal cycles.

• Typical cycle time per detector: typically 30 seconds.

• Heating temperature capability up to 400°C.

• Thermoelectric PMT cooler for maximum gain stability.

• Seven decade glow curve acquisition range.

• Options include glow curve deconvolution software (WinGCF Software), various types of neutral density filter to extend the high measurement range, and TL element specific carrier disks for best possible reproducibility.

• Warm-up time: 30 minutes.

• Easy to operate, service and maintain.

• Size: 38 × 46 × 48cm.

• 40kg.

Dosimetry Performance Using LiF:Mg,Ti (TLD-100/600/700):

• Nearly tissue equivalent.

• Radiation types: photons (E>5keV), electrons (E>70keV), neutrons (from thermal energies up to ∽100MeV, TLD-600 only).

• Measurement range: 10 μGy to 1 Gy (linear), 1 Gy to 20 Gy (supralinear).

• Detection threshold: <10 μGy based on 2.26 standard deviations for 10 sequential readings of an unexposed dosimeter.

• Repeatability: Less than 2% variation based on one standard deviation for 10 sequential measurements of 1 mGy 137-Cs.

• Residual TL signal: <0.2% of reading.

• Fading: <20% in 3 months without thermal treatment; <5% in 3 months using pre-read anneal or glow curve deconvolution software (WinGCF Software).

• Batch uniformity: ±30% from the factory standard.

• Reuse: typically %500.

Instrument Performance:

• Dynamic range: 7 decades.

• HV stability: ±0.005% per hour, ±0.02% per 8 hours.

• Linearity: better than 1%.

• Test light: temperature-stabilized LED.

• Electrical supply: selectable, 110/120VAC ±10%, 60Hz or 220/240VAC ±10%, 50Hz

• Nitrogen supply:
  Purified (99.995%), dry.
  Pressure: 2.8 to 6.3kg/cm2.
  Flow Rate: internally regulated to 400 liters/h if specified pressure is provided.

• Operating temperature: 15° to 40°C.

• Storage temperature: -10° to +60°C.

• Humidity: Functions within specification after 24 hour exposure to 90% humidity and subsequent 6-hour recovery with use of the nitrogen supply.

• Ambient light exposure: Functions within specifications when exposed to ambient light up to 1,000 Lux with cover on the reader.

• Shock: Withstands a 1-cm drop onto a concrete surface.

Ordering Alerts:

Computer requirements: Any commercially available PC system with Windows™ 7, XP, 2000, or NT 4. 32 bit OS only. RS232 strongly recommended. (Please contact your sales representative for approved USB to RS232 converters).

Compatible with:

Thermo Scientific TLD Materials, Thermo Scientific TLD Accessories

Recommended for:

Dose verification and research studies, quality assurance, whole body dosimetry, extremity dosimetry, environmental dosimetry, high dose applications (radiation hardness testing), and many more.