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 Electron/Scientific) are amongst the most highly-respected radiation  and monitoring instruments in use today.8


Over the years they have earned an excellent reputation for reliability, performance, versatility, ease of use and value formoney. 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 (charger and batteries not supplied)  
  • Rugged all-metal case
  • Curly probe lead
  • Available with a range of probes
  • Count & Dose rate (cpm/uSv/hr) models in stock 
  • Instruction Manual and Calibration Certificate Included
  • NEW Optional Waterproof Instrument Carry Case £38 (see below) 


                                            First time buyer?  Please Click HERE


The Mini Instrument & Thermo Electron/Scientific) 900s that we stock were all previouslyowned but they have generally been very well maintained, regularly calibratedand are in good working order. In addition to any necessary case refurbishments wecarry out a full range of operational checks, including probe supply testing& adjustment and, pulse-calibration (according to MI protocols and data), which we repeat immediately prior to despatch.  Some models have fixed probe/ratemeter cables, others have the factory original PET or TNC type connectors. If you have a specific connector requirement we may be able to help, just ask. All models come with an unconditional  6-months guarantee.

 

Please note that some of these instruments may have been in use for several years so there might be some light scuff-marks and minor scratches, but unless stated otherwisethey are full working order and, where applicable, have been pulse calibrated. Most models come with a copy of the original user manual but other than a battery holder and end-window protective cover (where applicable), they are not supplied with any accessories. Wegrade the cosmetic condition of the instruments that we sell from A+ to C-, withA indicating 'as-new' to very good, and C, full working order but a bit tatty to some more noticeable scratches, dinks and dents, etc. 


NEW! PROTECT YOUR INSTRUMENT

Optional hard waterproof carry case now available for most models *. Protect your instrument from knocks, bumps, water and accidents with a high quality IP67-rated, impact resistant carry case. Features include soft grip handle, holes for padlocks, auto pressure release, stackable design.  Price, including delivery with instrument £38.00 To add a case to your order simply click the item on the drop-down options list.

*unsuitable for the 900/G & 900/BPGM due to the size of probes. Larger cases available on request.


A SELECTION OF OUR CURRENT STOCK

They're Changing All The Time So Please Ask If The Model That You Require Isn't shown

(actual product photos, more pics available on request)


900/G MC70
£220.00 inc UK shipping

Mini Monitor 900/MC70
Typical Applications: low-level dose-rate monitoring
Meter Scale: 0 – 75 uSv/hr *
Probe: Type: MC70 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



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



900/ZP1A 
£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 TNC Connectors
Sensitivities: Alpha, Beta, Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: A-




900/AR ZP1/2 
£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 TNC Connectors
Sensitivities: Alpha, Beta, Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: A-




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


900/E (B)
£400.00 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 TNC connector
Sensitivities: Alpha, Beta, Gamma, X-Ray
Cosmetic Condition: B+
User-Set Threshold Alarm:  Yes
Energy Range: Manuf. specs



900/D
Sold Out - more soon

Thermo Scientific 900/D (MFG025A)
Typical Applications: general detecting/monitoring, measurement,
contamination control 
Meter Scale 0.5 - 1000 uSv/hr
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: 30KeV - 1.25MeV



900/EP15
£615.00 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: A



900/EP15 (2)
£600.00 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++



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



900/BPGM
£600.00 inc UK shipping

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




900/CSP
£700.00 inc UK shipping

Mini Monitor 900/CSP
Probe type: Custom Nal scintillation probe, TNC connector
Typical Applications: very low gamma detection,
contamination control
Meter Scale: 0 - 5k cps
Sensitivities: Beta, Gamma & X-Ray
User-Set Threshold Alarm: Yes
Cosmetic Condition: A 




900/42A
£785.00 inc UK shipping*

Mini Instrument  900/42A (MFG014)
Typical Applications: Low intensity X-Ray, 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+

* includes FREE waterproof hard carry case 


900/42B
£760.00 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+



900/44A-RP*
£760.00 inc UK Shipping

Mini Instruments 900 44A (MFG016)
Probe type 900/44A Nal scintillation probe, PET connector (notethe crystal in this probe has been replaced with a larger, more sensitive type -- see below

Typical Applications: very low gamma detection, contamination control
Meter Scale: 0 – 5k cps
Energy Range: 15 - 250keV (Beta > 500keV)
Sensitivities: Beta & Gamma
User-Set Threshold Alarm:   Yes
Cosmetic Condition: Good

* Important Note: refurbished probe with larger replacement Nal (T) crystal. Approximately
2 x sensitivity, using standard Cs137 check source, compared with standard 44A probe 


Important Information For Overseas Buyers:

The prices shown are for UK buyers and inclusive of delivery to mainland UK addresses. Overseas buyers are welcome and 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 £220.00

  • Product Code: Mini Instruments 900
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