Thermo Scientific™

RO-20 Ion Chamber Survey Meters

Catalog number: RO20AA
Thermo Scientific™

RO-20 Ion Chamber Survey Meters

Catalog number: RO20AA

Thermo Scientific™ Model RO-20 is a portable air ionization chamber instrument used to detect beta, gamma and X-radiation. Features five linear ranges of operation to measure exposure from background to 50 R/h full scale.

 
Catalog Number
RO20AA
Unit Size
Each
Description
RO-20 Ion Chamber Survey Meter, RO20AA
Price (USD)
Full specifications
Dimensions (L x W x H)7.9 x 4.2 x 7.7 in. (201 x 1047 x 196 mm)
Radiation TypeBeta, Gamma, X-Ray
TypeSurvey Meter
Battery DependenceReading is independent of battery voltage when the battery check indication is in the green arc
Battery Life150 to 6900 hr.
Battery TypeFive “C” cells
Chamber BiasTen 3V lithium coin cells, 30V
DescriptionRO-20 Ion Chamber Survey Meter, RO20AA
Energy RangePhoton Response: ± 30% from 8 keV to 1.3 MeV with the open slide facing the source; ± 15% from 33 keV to 1.3 MeV with the closed slide facing the source; ± 15% from 55 keV to 1.3 MeV through the side of the instrument; Beta Response: Uranium Slab: 30% of true
External Controlrange switch, including Off, Zero, and Battery checking positions. Zero knob used to set meter to zero when Zero position of range switch is selected or when in no significant radiation field. Light switch, for meter light
Height (English)7.7 in.
Height (Metric)19.6 cm
Humidity Range0 to 95%
Internal Controlsfive calibration controls, one for each range
LinearityWithin 5% of full scale
Measurement RangesLinear Ranges: 0 to 5, 0 to 50; 0 to 500 mR/h; (0 to 5; 0 to 50R/h)
Temperature (English) Operating-104° to 140°F
Temperature (Metric) Operating-40° to +60°C
Voltage30V
Weight (English)3.6 lb.
Weight (Metric)1.63 kg
Width (English)4.2 in.
Width (Metric)10.47 cm
Certifications/ComplianceSuccessfully tested to ANSI™ N42.17A. CE Certified to European standard EN50082-1 (EN61000-4-2 and EN61000-4-3)
DetectorsBeta, Gamma, X-Ray
Item DescriptionRO20AA
Length (English)7.9 in.
Length (Metric)201mm
Response Time90% of final reading within 5 seconds
Unit SizeEach
Catalog Number
Unit Size
Each
Description
RO-20 Ion Chamber Survey Meter, RO20
Price (USD)
Full specifications
Dimensions (L x W x H)7.9 x 4.2 x 7.7 in. (201 x 1047 x 196 mm)
Radiation TypeBeta, Gamma, X-Ray
TypeSurvey Meter
Battery DependenceReading is independent of battery voltage when the battery check indication is in the green arc
Battery Life150 to 6900 hr.
Battery TypeFive “C” cells
Chamber BiasTen 3V lithium coin cells, 30V
DescriptionRO-20 Ion Chamber Survey Meter, RO20
Energy RangePhoton Response: ± 30% from 8 keV to 1.3 MeV with the open slide facing the source; ± 15% from 33 keV to 1.3 MeV with the closed slide facing the source; ± 15% from 55 keV to 1.3 MeV through the side of the instrument; Beta Response: Uranium Slab: 30% of true
External Controlrange switch, including Off, Zero, and Battery checking positions. Zero knob used to set meter to zero when Zero position of range switch is selected or when in no significant radiation field. Light switch, for meter light
Height (English)7.7 in.
Height (Metric)19.6 cm
Humidity Range0 to 95%
Internal Controlsfive calibration controls, one for each range
LinearityWithin 5% of full scale
Measurement RangesLinear Ranges: 0 to 5, 0 to 50; 0 to 500 mR/h; (0 to 5; 0 to 50R/h)
Temperature (English) Operating-104° to 140°F
Temperature (Metric) Operating-40° to +60°C
Voltage30V
Weight (English)3.6 lb.
Weight (Metric)1.63 kg
Width (English)4.2 in.
Width (Metric)10.47 cm
Certifications/ComplianceSuccessfully tested to ANSI™ N42.17A. CE Certified to European standard EN50082-1 (EN61000-4-2 and EN61000-4-3)
DetectorsBeta, Gamma, X-Ray
Item DescriptionRO20
Length (English)7.9 in.
Length (Metric)201mm
Response Time90% of final reading within 5 seconds
Unit SizeEach
Catalog Number
Unit Size
Each
Description
RO-20 Ion Chamber Survey Meter, RO20SI
Price (USD)
Full specifications
Dimensions (L x W x H)7.9 x 4.2 x 7.7 in. (201 x 1047 x 196 mm)
Radiation TypeBeta, Gamma, X-Ray
TypeSurvey Meter
Battery DependenceReading is independent of battery voltage when the battery check indication is in the green arc
Battery Life150 to 6900 hr.
Battery TypeFive “C” cells
Chamber BiasTen 3V lithium coin cells, 30V
DescriptionRO-20 Ion Chamber Survey Meter, RO20SI
Energy RangePhoton Response: ± 30% from 8 keV to 1.3 MeV with the open slide facing the source; ± 15% from 33 keV to 1.3 MeV with the closed slide facing the source; ± 15% from 55 keV to 1.3 MeV through the side of the instrument; Beta Response: Uranium Slab: 30% of true
External Controlrange switch, including Off, Zero, and Battery checking positions. Zero knob used to set meter to zero when Zero position of range switch is selected or when in no significant radiation field. Light switch, for meter light
Height (English)7.7 in.
Height (Metric)19.6 cm
Humidity Range0 to 95%
Internal Controlsfive calibration controls, one for each range
LinearityWithin 5% of full scale
Measurement RangesLinear Ranges: 0 to 5, 0 to 50; 0 to 500 mR/h; (0 to 5; 0 to 50R/h)
Temperature (English) Operating-104° to 140°F
Temperature (Metric) Operating-40° to +60°C
Voltage30V
Weight (English)3.6 lb.
Weight (Metric)1.63 kg
Width (English)4.2 in.
Width (Metric)10.47 cm
Certifications/ComplianceSuccessfully tested to ANSI™ N42.17A. CE Certified to European standard EN50082-1 (EN61000-4-2 and EN61000-4-3)
DetectorsBeta, Gamma, X-Ray
Item DescriptionRO20SI
Length (English)7.9 in.
Length (Metric)201mm
Response Time90% of final reading within 5 seconds
Unit SizeEach
Showing 3 of 3
Catalog NumberSpecificationsUnit SizeDescriptionPrice (USD)
RO20AAFull specifications
EachRO-20 Ion Chamber Survey Meter, RO20AARequest A Quote
Dimensions (L x W x H)7.9 x 4.2 x 7.7 in. (201 x 1047 x 196 mm)
Radiation TypeBeta, Gamma, X-Ray
TypeSurvey Meter
Battery DependenceReading is independent of battery voltage when the battery check indication is in the green arc
Battery Life150 to 6900 hr.
Battery TypeFive “C” cells
Chamber BiasTen 3V lithium coin cells, 30V
DescriptionRO-20 Ion Chamber Survey Meter, RO20AA
Energy RangePhoton Response: ± 30% from 8 keV to 1.3 MeV with the open slide facing the source; ± 15% from 33 keV to 1.3 MeV with the closed slide facing the source; ± 15% from 55 keV to 1.3 MeV through the side of the instrument; Beta Response: Uranium Slab: 30% of true
External Controlrange switch, including Off, Zero, and Battery checking positions. Zero knob used to set meter to zero when Zero position of range switch is selected or when in no significant radiation field. Light switch, for meter light
Height (English)7.7 in.
Height (Metric)19.6 cm
Humidity Range0 to 95%
Internal Controlsfive calibration controls, one for each range
LinearityWithin 5% of full scale
Measurement RangesLinear Ranges: 0 to 5, 0 to 50; 0 to 500 mR/h; (0 to 5; 0 to 50R/h)
Temperature (English) Operating-104° to 140°F
Temperature (Metric) Operating-40° to +60°C
Voltage30V
Weight (English)3.6 lb.
Weight (Metric)1.63 kg
Width (English)4.2 in.
Width (Metric)10.47 cm
Certifications/ComplianceSuccessfully tested to ANSI™ N42.17A. CE Certified to European standard EN50082-1 (EN61000-4-2 and EN61000-4-3)
DetectorsBeta, Gamma, X-Ray
Item DescriptionRO20AA
Length (English)7.9 in.
Length (Metric)201mm
Response Time90% of final reading within 5 seconds
Unit SizeEach
RO20Full specifications
EachRO-20 Ion Chamber Survey Meter, RO20Request A Quote
Dimensions (L x W x H)7.9 x 4.2 x 7.7 in. (201 x 1047 x 196 mm)
Radiation TypeBeta, Gamma, X-Ray
TypeSurvey Meter
Battery DependenceReading is independent of battery voltage when the battery check indication is in the green arc
Battery Life150 to 6900 hr.
Battery TypeFive “C” cells
Chamber BiasTen 3V lithium coin cells, 30V
DescriptionRO-20 Ion Chamber Survey Meter, RO20
Energy RangePhoton Response: ± 30% from 8 keV to 1.3 MeV with the open slide facing the source; ± 15% from 33 keV to 1.3 MeV with the closed slide facing the source; ± 15% from 55 keV to 1.3 MeV through the side of the instrument; Beta Response: Uranium Slab: 30% of true
External Controlrange switch, including Off, Zero, and Battery checking positions. Zero knob used to set meter to zero when Zero position of range switch is selected or when in no significant radiation field. Light switch, for meter light
Height (English)7.7 in.
Height (Metric)19.6 cm
Humidity Range0 to 95%
Internal Controlsfive calibration controls, one for each range
LinearityWithin 5% of full scale
Measurement RangesLinear Ranges: 0 to 5, 0 to 50; 0 to 500 mR/h; (0 to 5; 0 to 50R/h)
Temperature (English) Operating-104° to 140°F
Temperature (Metric) Operating-40° to +60°C
Voltage30V
Weight (English)3.6 lb.
Weight (Metric)1.63 kg
Width (English)4.2 in.
Width (Metric)10.47 cm
Certifications/ComplianceSuccessfully tested to ANSI™ N42.17A. CE Certified to European standard EN50082-1 (EN61000-4-2 and EN61000-4-3)
DetectorsBeta, Gamma, X-Ray
Item DescriptionRO20
Length (English)7.9 in.
Length (Metric)201mm
Response Time90% of final reading within 5 seconds
Unit SizeEach
RO20SIFull specifications
EachRO-20 Ion Chamber Survey Meter, RO20SIRequest A Quote
Dimensions (L x W x H)7.9 x 4.2 x 7.7 in. (201 x 1047 x 196 mm)
Radiation TypeBeta, Gamma, X-Ray
TypeSurvey Meter
Battery DependenceReading is independent of battery voltage when the battery check indication is in the green arc
Battery Life150 to 6900 hr.
Battery TypeFive “C” cells
Chamber BiasTen 3V lithium coin cells, 30V
DescriptionRO-20 Ion Chamber Survey Meter, RO20SI
Energy RangePhoton Response: ± 30% from 8 keV to 1.3 MeV with the open slide facing the source; ± 15% from 33 keV to 1.3 MeV with the closed slide facing the source; ± 15% from 55 keV to 1.3 MeV through the side of the instrument; Beta Response: Uranium Slab: 30% of true
External Controlrange switch, including Off, Zero, and Battery checking positions. Zero knob used to set meter to zero when Zero position of range switch is selected or when in no significant radiation field. Light switch, for meter light
Height (English)7.7 in.
Height (Metric)19.6 cm
Humidity Range0 to 95%
Internal Controlsfive calibration controls, one for each range
LinearityWithin 5% of full scale
Measurement RangesLinear Ranges: 0 to 5, 0 to 50; 0 to 500 mR/h; (0 to 5; 0 to 50R/h)
Temperature (English) Operating-104° to 140°F
Temperature (Metric) Operating-40° to +60°C
Voltage30V
Weight (English)3.6 lb.
Weight (Metric)1.63 kg
Width (English)4.2 in.
Width (Metric)10.47 cm
Certifications/ComplianceSuccessfully tested to ANSI™ N42.17A. CE Certified to European standard EN50082-1 (EN61000-4-2 and EN61000-4-3)
DetectorsBeta, Gamma, X-Ray
Item DescriptionRO20SI
Length (English)7.9 in.
Length (Metric)201mm
Response Time90% of final reading within 5 seconds
Unit SizeEach
Showing 3 of 3
Ionization chamber is vented to atmospheric pressure and is specifically designed to have a flat energy response into the X-ray region.
  • The detector is fully compensated over the operational temperature range for output accuracy within 10% ± 0.5 mR/h; eliminates need for temperature correction
  • Each instrument is factory calibrated to gamma radiation
  • A single rotary switch turns the instrument off, checks the batteries, checks the zero setting, and selects the range of operation
  • An ergonomically located switch illuminates the meter
  • Internal switching of ranges is accomplished with reed relays, eliminating the mechanical swing arms typically used with portable ion chamber survey instruments
  • Chamber has a diameter of 7.32cm (2.88in.) and a volume of 220cm3 (13.4 cu. in.)
  • Detector has 640 mg/cm2 phenolic walls inside a 1.6mm (0.063in.) aluminum wall case for a total thickness of approximately 1,000 mg/cm2
  • A 7.9mm (0.31in.) thick phenolic sliding beta shield with a positive friction lock is mounted on the bottom of the chamber
  • The shield thickness is approximately 1,000 mg/cm2
  • The chamber window is comprised of two layers (one on the chamber, one on the can) of 25 micron (0.001in.) mylar, approximately 7 mg/cm2 total
  • Measures gamma or X-ray exposure rate
  • Large backlit display
  • Long battery life
  • Sliding shield for beta measurements
  • Seals used at openings for dust and water resistance; detector is protected by a silica-gel dryer
  • Options include 137Cs gamma check source (CS-7A) and carrying strap (ZP11466031)

Figures

Frequently asked questions (FAQs)

Citations & References