FH 40 G Multi-Purpose Digital Survey Meter
FH 40 G Multi-Purpose Digital Survey Meter
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Thermo Scientific™

FH 40 G Multi-Purpose Digital Survey Meter

Use one convenient, versatile instrument for multiple radiation detection applications including personal radiation protection and beta, x-ray and gamma radiation detection.
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Catalog NumberProduct TypeMeasurement RangeUnitsIncludes
425401401Display UnitN/ASv/hNo internal counter tube
4254002Digital Survey Meter10 μR/h to 99 R/h, 36keV to 1.3MeVSelectable units: Sv/h, R/h, Gy/hNo extra earphone connector
425400201Digital Survey Meter0.1 μSv/h to 0.99Sv/h, 36keV tp 1.3MeVSelectable units: Sv/h, R/h, Gy/hNo extra earphone connector
4254004Digital Survey MeterUp to 10 R/hSelectable units: Sv/h, R/h, Gy/hNo extra earphone connector
425400401Digital Survey MeterUp to 0.1 Sv/hSelectable units: Sv/h, R/h, Gy/hNo extra earphone connector
425400450Digital Survey MeterUp to 10 R/hSelectable units: Sv/h, R/h, Gy/hExtra earphone connector
4254006Digital Survey MeterUp to 1 Sv/hSv/hNo extra earphone connector
425400650Digital Survey MeterUp to 1 Sv/hSv/hExtra earphone connector
4254008Digital Survey MeterUp to 100 mSv/hSv/hNo extra earphone connector
425400802Digital Survey MeterUp to 100 mSv/hSv/hNo extra earphone connector, no nanosievert units
425400850Digital Survey MeterUp to 100 mSv/hSv/hExtra earphone connector
425400852Digital Survey MeterUp to 100 mSv/hSv/hExtra earphone connector, no nanosievert units
4254009Digital Survey Meter1 µR/h to 10 R/hR/hConnection of earphone or external alarm relays
4254014Display UnitN/AR/hNo internal counter tube
425400250Digital Survey Meter10 μR/h to 99 R/h, 36keV to 1.3MeVSelectable units: Sv/h, R/h, Gy/hExtra earphone connector
FH40GLDS3WarrantyN/AN/AN/A
425400451Digital Survey MeterUp to 0.1 Sv/hSelectable units: Sv/h, R/h, Gy/hExtra earphone connector
4254016Digital Survey MeterUp to 100 mSv/hSv/hConnection (external probes are not supported) or external alarm relays
425400251Digital Survey Meter0.1 μSv/h to 0.99Sv/h, 36keV tp 1.3MeVSelectable units: Sv/h, R/h, Gy/hExtra earphone connector
425401450Display UnitN/AR/hNo internal counter tube, extra earphone connector
Catalog number 425401401
Price (CNY)
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Product Type:
Display Unit
Measurement Range:
N/A
Units:
Sv/h
Includes:
No internal counter tube
Serve multiple radiation detection applications with one versatile instrument. The Thermo Scientific™ FH 40 G is a wide range digital Geiger counter suitable for nearly all measurement tasks arising in radiation protection through optional plug and play probes available for neutron measurement, alpha and beta contamination readings and even to detect artificial gamma radiation in variable natural radiation fields.

The FH 40 G is a versatile multipurpose Geiger counter and area monitor that can be used with external detectors for portable and remote area monitoring applications.

  • Rugged, waterproof and reliable with very simple operation.
  • Gamma meter with internal proportional counter tube.
  • Integrated gamma dose rate measurements.
  • Interface for one optional, external plug and play probe.
  • Alarm thresholds for the internal detector and external probes of the FH 40 G are monitored simultaneously.
  • Upon connection of an external plug and play probe, the probe parameters are automatically read into the FH 40 G and the correct parameters are set.
  • High voltage generation inside the plug and play probe makes the system calibration independent of cable length.
  • Separate alarms can be set by the user for both the internal and external detectors.
  • Operational internal proportional detector and connected external detector.
  • Serial infrared interface.
  • Simultaneous operation of internal and external detectors, both dose rate and remote dose rate readings.
  • Configuration and data read out via PC.
  • Waterproof (IP 67) and shock resistant.
  • ADF mode (Advanced Digital Filter).
  • Clear, backlit LCD display.
  • Datalogging capability.
  • Internal diagnostics ensure proper functioning of the detector(s) and the electronics.
  • Designed to record up to 256 data points containing measurement number, date, time and dose rate at the internal detector and external detector, status, and optional barcode information.
  • Wide range of plug and play external probes for monitoring and detection.
  • All FH 40 G versions and external probes containing the “-10” suffix are designed to meet the energy response behavior of the new SI-units ambient dose equivalent and ambient dose equivalent rate according to ICRU 39.

Short summary of available plug and play probes:

  • Gamma dose rate measurement: FHT 192 (ionization chamber), FHZ 632 (proportional counter), FHZ 612 (wide range), FHZ 302/312 (under water nuclear power).
  • Gamma search probes: FHZ 502, 503, 512 (NaJ/BGO).
  • Contamination: FHZ 742 (Scintillator), FHZ 732 (Pancake/proportional counter), FHZ 382 (Scintiallator + Alpha/Beta discriminator via LED indication if alphas are present).
  • Aritificial radiaiton discrimination: NBR probe FHZ 672.
  • Preamplifiers for various classic probes.
  • Wide range of accessories like cables, telepoles, application specific kits, etc.
FH G and FH 40 G-L series meters (4254002, 425400201, 425400250, 425400251, 4254004, 425400401, 425400450, 425400451) are not for sale in the UK

The FH 40 G instrument is available in different versions:

FH 40 G

  • Measured Quantity: Roentgen (R)
  • Measuring Range: 1 μR/h ... 100 R/h
  • Energy range: 36 keV ... 1.3 MeV
  • Dose measuring range: 10 μR - 1000 R

FH 40 G-L

  • Measured Quantity: Roentgen (R)
  • Measuring Range: 1 μR/h ... 10 R/h
  • Energy range: 36 keV ... 1.3 MeV
  • Dose measuring range: 10 μR - 100 R

FH 40 G-10

  • Measured Quantity: Sievert (Sv; Ambient dose equivalent rate H*(10))
  • Measuring Range: 10 nSv/h ... 1 Sv/h
  • Energy range: 30 keV ... 4.4 MeV
  • Dose measuring range: 100 nSv ... 10 Sv

FH 40 G-L10

  • Measured Quantity: Sievert (Sv; Ambient dose equivalent rate H*(10))
  • Measuring Range: 10 nSv/h ... 100 mSv/h
  • Energy range: 30 keV ... 4.4 MeV
  • Dose measuring range: 100 nSv ... 1 Sv

FH 40 G-X

  • No internal detector, operation of external plug and play probe only

General specifications of all FH40G units

  • Dimensions 7.7 x 2.9 x 1.7 in. (195 x 73 x 42mm)
  • Weight[s] 0.9 lb. (410g)
  • Battery type: 2 x AA
  • Neutron dose rate measurement: FHT 762 WENDI-2, FHT 772 H-2 REMBALL
  • Neutron search probes: FHT 752 SH-2 (He-3, 2bar)
Specifications
CalibrationSv/h display when used with calibrated probes.
Certifications/ComplianceMeets IP 67 requirement for waterproofing; shock-resistence / NRPB approved (UK); ICRU 39 for SI-units
Depth (English)7.7 in.
DescriptionFH 40 G-X Display Unit, all FH 40 G external detectors can be connected to this device
Dose RangeFH 40 G: 10 µR - 1000 R; FH 40 G-L, FH 40 GL-omega: 10 µR - 100 R; FH 40 G-10: 100 nSv - 10 Sv
Height (English)1.7 in.
IncludesNo internal counter tube
Measured QuantityFH 40 G, FH 40 G-L, FH 40 GL-omega: Response (Roentgen) - R; FH 40 G-10: Ambient dose equivalent rate (H™(10)) - Sv
Measurement RangeN/A
Sensitivity> 30 keV
UnitsSv/h
Weight (English)0.9 lb.
Width (English)2.9 in.
Depth (Metric)195 mm
Energy RangeFH 40 G: 36 keV to 1.3 MeV; FH 40 G-L: 36 keV to 1.3 MeV; FH 40 G-10: 30 keV to 4.4 MeV; FH 40 GL-omega: 36 keV to 1.3 MeV
Height (Metric)4.2 cm
Product TypeDisplay Unit
Radiation TypeDependent on probe used
Weight (Metric)0.41 kg
Width (Metric)7.4 cm
Unit SizeEach