Dosimeter-radiometer

МKS-05 TERRA

TERRA is a professional device for official measurements, which measures the level of gamma background, beta contamination, accumulated dose, and its accumulation time.

TERRA is exported to over 70 countries. The device is in operation in many Governmental Institutions and Agencies worldwide.

NSN 6665 61 000 0177

Features

Big display with luminescent backlight
Simultaneous indication of units of measurement, measurement errors, threshold level, and real-time on the display
Analog ten-segment indicator of registered radiation intensity
Ability to perform measurements with a preset error
Four-level indication of battery discharge
Built-in memory which allows storing up to 1 200 measurements
Five independent measuring channels with the alternate indication of data on the single liquid crystal display
Built-in gamma, beta-sensitive Geiger-Muller counter
Prompt evaluation of gamma background within 10 seconds
Automatic subtraction of gamma background at measurement of beta contamination
Measurement results averaging, manually and automatically interrupted
Automatic setting of measurement intervals and ranges
Audio, vibration, and vibration-audio alarm of each detected gamma-quantum or beta-particle that can be switched off
Two-tone audio, vibration, and vibration-audio alarm of exceeded programmed threshold levels
Clock and alarm clock

Purpose Of Use

Measurement of ambient dose equivalent rate (DER) of gamma and X-ray radiation (photon-ionizing radiation)
Measurement of ambient dose equivalent (DE) of gamma and X- ray radiation
Measurement of surface beta-particles flux density
Measurement of ambient dose equivalent accumulation time

Delivery Kit

dosimeter-radiometer
leather case
operating manual
package

Specifications

Measurement range of photon-ionizing radiation DER

0.1 … 9 999 µSv/h

Main relative permissible error limit of photon-ionizing radiation DER measurement with confidence probability of 0.95 , where P is a numeric value of the measured DER in μSv/h

(15+2/P) %

Measurement range of photon-ionizing radiation DE

0.001 … 9 999 mSv

Main relative permissible error limit of photon-ionizing radiation DE measurement with confidence probability of 0.95

±15 %

Energy range of registered photon-ionizing radiation

0.05 … 3 MeV

Energy dependence when measuring gamma radiation DER and DE relative to 0.662 MeV energy (¹³⁷Cs) in the energy range from 0.05 to 1.25 MeV, not more

±25 %

Measurement range of surface beta-particles flux density

10 … 100 000 part./(cm²·min)

Main relative permissible error limit of beta-particles flux density measurement with confidence probability of 0.9, where B is a numeric value of the measured surface flux density in part./(cm²·min)

(20+200/B) %

Energy range of registered beta-particles

0.5 … 3 MeV

Measurement range of DE accumulation time

9 999 h

Resolution of DE accumulation time display in the range of 0 h to 100 h

1 min

Resolution of DE accumulation time display in the range of 100 h to 9 999 h

1 h

Absolute permissible error limit at DE accumulation time measurement during 24 h

±1 min

Time of the dosimeter operating mode setting, not more

1 min

Battery life (AAA x 2 of 1 280 mAh capacity) under +20 °С temperature, natural background radiation and switched off display backlight, not more

2 000 h

Operating supply voltage

3 V

Operating temperature range

-20 … +50 °С

Dimensions, not more

55 × 26 × 120 mm

Weight, not more

0.2 kg

Documentation

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The products are manufactured under controlled conditions established by the Bureau Veritas Certification-certified Quality Management System, which complies with the requirements of ISO 9001:2015, certificate number: UA231547.

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