Model Cobia Flex

Flexible X-Ray QA Tool

Part Number: 99-9905

Features

Quickly Ascertain X-Ray Output Accuracy
Large 320 x 240 Pixel Color Display
Built-In mAs for Versatility
Display Rotates for Ease of Positioning

The Cobia Flex is a straightforward and simple-to-use instrument for checking that the output from an X-ray tube is correct. The measured values can be read directly from the large, easy-to-read display and can also be stored in the device to be read later.

The internal detector can measure dose, dose rate, kV, HVL, TF, and time. External probes can also be connected to make the Cobia Flex suit your specific needs. A built-in mAs is included, but can be deselected if not required.

The Cobia Flex has no position dependence, just place it under the beam and make sure the detector area is irradiated. There is no need to reset the device between your measurements, so you can stay in the control room until all your measurements are made. The practical log function makes it possible for you to read your measurements when you have the time.

Specifications

Display	Color, 320 x 240 pixel
Minimum Exposure Time	0.1 ms
Sensitivity	0.2 mA at 50 kV, 50cm (3 mm Al)
Power	Internal battery or external power supply
Battery Life	10 to 20 hours
Size (L x W x H)	13.8 x 7.6 x 2.7 cm (5.4 x 3 x 1 in.)
Weight	Approximately 290 g (10.2 oz.)

Parameters

Tube Voltage	38 to 155 kVp (± 2%)
Time	0 ms to 2000 sec (± 1% or ± 0.33 ms) 3 to 9999 pulses
Dose	60 nGy to 1700 Gy (± 5%) 7 μR to 200 kR (±5 %)
Dose Rate	2.5 μGy/s to 175 mGy/s (± 5% or ± 200 nGy/s) 0.3 mR/s to 20 R/s (± 5% or ± 20 µR/s) 17 mR/min to 1200 R/min (± 5 % or ± 1 mR/min) 1 R/h to 70 kR/h (± 5 % or ± 70 mR/h)
Auto Compensation	1.5 mm Al to 1.4 mm Cu
HVL	1.2 to 14 mm Al (± 10% or ± 0.2 mm)
Total Filtration	1.0 to 55 mm Al (± 10% or ± 0.3 mm Al)
Pulse Frequency	1/6 to 260 Hz (±5% or ±0.2 Hz)
Dose/Pulse	10 nGy/p to 1 Gy/p (±5 %) 1.1 µR/p to 120 R/p (±5 %)
Effective Time	0 ms to 1999 s (±1% or ±0.33 ms)

Options

Option	Description	Part Number
Light Probe	The light probe is designed with the same spectral response as the human eye, It measures the brightness on monitors and film viewing boxes, along with the ambient light of the area for QA requirements of modern X-ray departments. The spectral response complies with the CIE curve V(λ).	99-9915
Dose Probe	Designed to perform very low dose rate measurements, this solid-state detector’s minimalist cross-section minimizes interference with AEC (Automatic Exposure Control) on X-ray equipment. The compact size also enables it to fit into the table bucky. The fast response time makes it ideal for both pulsed and continuous fluoroscopy. The probe automatically identifies the connected Cobia instrument and automatically adjusts, requiring no input from the user.	99-9916
Chamber Adapter	Provides users with the option to use up to five different tri-axial cable equipped ion chambers with their Cobia Flex instruments. Adapter cable required if ion chamber does not have LEMO type O connector. The device is optimized for use with CT and Mammography applications but may be used in other procedures.	99-9925
CT Ion Chamber - 10 cm	A pencil-shaped air ionization chamber that measures and monitors the exposure output level of CT scanners in air or in a phantom. It measures the CT Dose Index, or CTDI, in accordance with IEC 61223-2-6. This device must be used with the chamber adapter.	99-9926

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