UK Shipping included; overseas buyers see important note below*


Mini Monitor 900 Series Geiger Counters and Ratemeters, manufactured in the UK by Mini Instruments Ltd (and latterly, Thermo Scientific) are amongst the most highly-respected radiation measurement and monitoring instruments in use today.

Over the years they have earned an excellent reputation for reliability, performance, versatility, ease of use and value for money. Mini Monitor 900s continue to be a popular choice in teaching, research, hospitals, industry and amongst environmentalists and enthusiasts. Here’s just a brief outline of the key features:
 
  • Large, logarithmic meter, accurately displays both very low and high levels
  • Portable & bench operation (mains adaptor or 6 x AA cells)
  • Battery life 300 hrs (typical, 4 hrs use per day)
  • Ease of use – single control for battery check, power on & mute

  • User-settable threshold alarm
  • Battery check
  • Built-in sounder with Mute function
  • Probe cradle and carry handle
  • External DC power & charge socket  
  • Rugged all-metal case
  • Curly probe lead
  • Available with a range of probes
  • Count & Dose rate (cpm/uSv/Hr) models in stock 

 

                                            First time buyer?  Please Click HERE


The Mini Instrument 900s that we stock were all previously owned but they have generally been very well maintained regularly calibrated and are in good working order. In addition to any necessary case refurbishments we carry out a full range of operational checks, including probe supply testing & adjustment and, where applicable (models with CPS scaled metes) pulse-calibration, which we repeat immediately prior to despatch.  Some models will have TNC type connectors on the body and/or probe, replacing the outmoded PET connector originally fitted. All models come with an unconditional  6-months guarantee.

 

Please note that these instruments may have been in use for several years so there might be some light scuff-marks and minor scratches, but unless stated otherwise they are full working order and, where applicable, have been pulse calibrated. Manuals will be included where available and other than a battery holder and end-window protective cover (where applicable), they are not supplied with any accessories. We grade the cosmetic condition of the instruments that we sell from A+ to D-, with A+ indicating ‘as-new’, and D- working but ‘tatty with more  noticeable scratches, dinks, dents etc. 


CURRENT STOCK (see photos, actual products, more available on request)


M5/900/MC20 
NEW LOW PRICE!
£150.00 inc UK shipping

Mini Monitor 900/MC20
Typical Applications: low-level dose-rate monitoring
Meter Scale: 0 – 75 uSv/hr *
Probe: Type: MC20 Compensated GM tube, PET connector
Energy Range: 50keV to 1.25MeV
Sensitivities: Gamma & X-Ray (>75kVp)
User-Set Threshold Alarm:   Yes
Cosmetic Condition: A

*Also available with CPM scaled meter




M7/900/R 
£280.00 inc UK shipping 

Mini Monitor 900/R (MFG016)
Typical Applications: high-level dose-rate monitoring
Meter Scale: 0 – 5k uSv/hr
Probe type: Probe: Type MC10 Compensated GM tube
Energy Range: 45keV to 1.25MeV
Sensitivities: Gamma & X-Ray (. 75kVp
User-Set Threshold Alarm:   Yes
Cosmetic Condition: A




M12/900/ZP 
£375.00 inc UK shipping

Mini Monitor 900/ZP (ARZP1451)
Typical Applications: monitoring, general detecting
Probe type: Probe: Custom ZP1A 28mm mica end window Compensated GM tube
Sensitivities: Alpha, Beta, Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: A-




M8/900/72511
£400.00 inc UK shipping

Mini Monitor 900/72511
Typical Applications: general detecting/monitoring
Meter Scale: 0 – 2000cpm
Probe: Type: LND 72511 thin-wall GM tube
Energy Range: (manuf. specs)
Sensitivities: Beta, Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: A


M4/900/E 

£425.00 inc UK shipping

Thermo Scientific 900/E (MFG001)
Typical Applications: general detecting/monitoring, measurement, contamination control 
Meter Scale 0 - 2k cps
Probe: type E thin mica end window GM tube 6.0cm²
Sensitivities: Alpha, Beta, Gamma, X-Ray
Cosmetic Condition: A-
User-Set Threshold Alarm:  Yes
Energy Range: Manuf. specs



M9/900/EP15
£550.00 inc UK shipping

Mini Monitor 900/EP15                                                                                                                          
Typical Applications: high sensitivity Alpha, Beta, general detecting/contamination control
Meter Scale: 0 – 1000cpm
Probe: Type: LND 7313, large window  halogen quenched GM tube
Energy Range: (manuf. specs)
Sensitivities: High Sensitivity Alpha, Beta & Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: B+


M10/900/EP15
£550.00 inc UK shipping

Mini Monitor 900/EP15                                                                                                                          
Typical Applications: high sensitivity Alpha, Beta, general detecting/contamination control
Meter Scale: 0 – 1000cpm
Probe: Type: LND 7313, large window  halogen quenched GM tube, TNC connector
Energy Range: (manuf. specs)
Sensitivities: High Sensitivity Alpha, Beta & Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: B+




M15/900/EL
£550.00 inc UK shipping

Mini Monitor 900/EL                                                                                                                          
Typical Applications: high sensitivity Alpha, Beta, general detecting/contamination control
Meter Scale: 0 – 500cpm
Probe: Type: DN212 5cm mylar/Mica end window  organic quenched GM tube
Energy Range: 
Sensitivities: High Sensitivity Beta +  Alpha & Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: A




M16/900/BPGM
£550.00 inc UK shipping

Mini Monitor 900/BPGM
Typical Applications: monitoring, general detecting
Probe type: Probe: Bicron PGM mica-window Pancake Probe,  MHV connector
Sensitivities: Alpha, Beta, Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: A





M6/900/44A
£730.00 inc UK shipping 

Mini Monitor 900/44A (MFG016)
Typical Applications: general detection, contamination control
Meter Scale 0 – 5k cps
Probe type 900/44A Nal scintillation probe, TNC connector
Energy Range: 15 - 250keV (Beta > 500keV)
Sensitivities: Beta & Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: A-





M2/900/42B
£780.00 inc UK shipping

Thermo Scientific 900/42B (MFG015)
Typical Applications: very low gamma detection, contamination control
Meter Scale: 0 – 5k cps
Probe type: 900/42B Berylium window NAl scintillation probe, PET connector
Energy Range: 5keV - 250keV (Beta > 500keV)
Sensitivities: Beta & Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition A+




M14/900/C/BSBT11

Currently out of stock -- more soon

Mini Monitor 900/C/BSBT11
Typical Applications: monitoring, general detecting
Probe type: Probe: Custom 30 x 18mm mica end window Compensated GM tube , TNC connector
Sensitivities: Alpha, Beta, Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: A-



*Very Important Stuff For Overseas Buyers:
The prices shown are for UK buyers and inclusive of delivery to mainland UK addresses. Overseas buyers should contact us before ordering for shipping options, which vary according to location. Please also note that this item may be prohibited or restricted in some countries.


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Mini Monitor 900s Geiger Counters, Rate & Dosemeters - NEW STOCKS, prices start at just £150

  • Product Code: Mini Instruments 900
  • Availability: In Stock
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