buy for sale infra-red IR thermometer radiation detect measure discount surplus bargain geiger counter Monitor 4 inspector+ RADEX measurement detector probe
Tel: +1-518-608-6479          IR, UV & Ionizing Radiation Detectors  
Infra-Red, Ultra-Violet, Alpha Beta & Gamma Radiation Meters, Detectors, Sensors, Geiger Counters    
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UV, IR, and Geiger Counters

Ultra-violet meters
Infra-red Sensors
IR Thermometers& Cameras
Geiger Counters



Choose UVA+UVB, UVB only, or UVC Model

Whether checking sunlight for outdoor exposure safety, checking tanning beds or UV blacklight lamps, or the effectiveness of UV blocking shades, clothes or lotions, these UV intensity meters give high accuracy readout of the ultra-violet radiation levels. Extremely simple to operate. Numerical readout in mW/cm (W/cm for UVC). Each model comes with a carrying case, instruction brochure and NIST traceable calibration certificate. Uses one 9V battery. Made in USA.

Cat. #
To Order
UV A+B280-400 nm0-199.9 mW/cmA160$179.00add to cart
UVB only280-320 nm0-19.99 mW/cmA161$189.00add to cart
UVC only246-262 nm0-1999 W/cmA162$239.00add to cart
Made in USA



Sunburn UV Warning Meter

This neat little device can alert you when the intensity of Sun's ultraviolet (UV) rays exceeds dangerous limits so you can take proper steps to protect your skin and eyes. Perfect for outdoor activities in all seasons and all weather conditions! Take it to a ski get-away, a play date in the park, or a sunny day on the beach!

SunMate stands out from other UV detectors on the market:
Affordable high end UV detector covering full spectrum of UV rays (UV-A, UV-B, and UV-C).
Fit for all weather conditions, sunny, cloudy, even snowy days.
Superior Accuracy! Advanced photo-diode technology (specially for UV) ensures accurate reading of UV. Note that inaccurate readings can cause sunburns too!
Simplicity! With Safe/Caution/Warning lights, you can use it without any technical background.
Weighing only 0.7 oz and the size of a pack of gum, easy to attach to a key chain or carry in your pocket/purse.
Durable for years of usage instead of one time use.

With best quality yet affordable price, SunMate is your choice for accurate and speedy UV detection for your family!

Indications (by UV Index):
0 - 2
2 - 4
4 - 7
No light
Green (Safe)
Yellow (Caution)
Red (Warning)

SunMate (Cat. #A905) ........... $35.00 add to cart

Dual RF/IR Detector

Dual RF/IR Detector

Light beams, especially lasers, provide an excellent method for carrying audio intelligence and are not detectable by ordinary RF (radio frequency) detectors. For those who need either a very sensitive RF detector or an infrared (IR) detector this unique item allows you to search for sources of either RF or infrared transmissions.

With its bandwidth of 1 MHz to 2500 MHz and its extra sensitive circuitry, it will pick up signals that other detectors may miss. It is designed to pick up subminiature radio and infrared transmitters wherever they are located - in your home, office or car. To change from RF to IR detection, simply use the convenient front panel switch.

Using the SENSITIVITY control and meter readings, you can quickly zero in on hidden RF and IR transmitters. Also use it to check your telephone and its associated wiring for RF bugs and taps. Can even be used to test your IR remote devices (TV remotes, etc.). Spectral Peak at 940 nm.

Weighing only 8 oz., it is furnished in a high-impact case that measures 5.3" x 3.3" x 1.5". The telescoping whip antenna can be extended 33". The unit comes complete with 9 volt battery, antenna and instructions.

Made in USA Dual RF/IR Detector (Cat. #A177-IR) .. $265.00 add to cart



Tests any Infra-red Remote Control Device

Remote control not working? Maybe its the batteries, maybe the remote is shot, or maybe its the TV/VCR/Stereo/AC or other controlled device! This Remote Control tester will confirm the operation on any IR remote control. Simply plug the tester into an AC outlet (100V~220V) and point your remote control at the tester. A red LED will light up and sound will be heard when an IR (infrared) signal is detected

Compact and light construction makes it very portable. A great addition to the tool box of any technician who works with fiber optic systems using infrared. Has standard European 2-pin plug plus a North American adapter so it can be used in either location.

Remote Control Tester (Cat. #A445) ............... $12.95 add to cart


Super Small for Convenience or Clandestine Work

The perfect tool for port-ability and ease of use. Readout in C or F. Super light weight, versatile, and full featured. Low price too! PEN-TYPE IR THERMOMETER

  • Temperature Range: -50C to 220C; -58F to 428F
  • Resolution: 0.1C or F
  • Accuracy: 2% or 2C
  • Spot Ratio: 1:1
  • Emissivity: 0.95 fixed
  • Response Time: 500ms
  • Weight: 20g

Also Includes:
Data Hold Function
Auto Power Shut Off
Low Battery Indication
Carry strap

Handy for kitchen, workshop, hobby, and paranormal research uses.

Pen-type IR Thermometer (Cat. #A400) ............. $24.95 add to cart


Digital Local/Remote Thermometer Measure Local And Remote Temperatures Simultaneously

Simple-to-use and lightweight digital thermometer will measure the air temperature at 2 locations and displays both readings simultaneously. Its one thing to find a warm or cold spot. Its quite another to find a warm or cold spot that is different from the ambient surroundings!

Meter has one internal sensor at the location of the display, and another remote sensor on a 6 foot cable. High resolution. Includes memory for min/max values, alert/set button to enter a preset value for local/remote temperature, temperature readout in C or F.


  • temperature range
    • local: -20C to +50C (-4F to +122F)
    • remote: -50C to +70C (-58F to +158F)
  • resolution: 0.1C (0.1F)
  • refresh rate: 15 seconds
  • digit height: 12mm (0.5"); display size: 30 x 40mm (1.18" x 1.57")
  • unit size: 110 x 70 x 20mm (4.3" x 2.75" x 0.78")
  • power supply: 1 x 1.5 V AAA battery (LR3C) (incl.)
Also great for checking indoor and outdoor temperature at home or office. Can be wall mounted or hand held.

Digital In/Out Thermometer (Cat. #A468) $9.95 add to cart



Comfortable Pistol Grip, Laser Pointer, Backlight, and Super Low Price


Measuring range: -20 to +500C (-4 to 932F)
Resolution: 0.1
Accuracy: 2.5% or 3
Spot ratio: 10:1


Simple operation: automatically powers ON when the trigger is pulled
Auto shut-off 15 seconds after the trigger is released
Data hold: holds last reading for 5 secs after trigger is released
Laser indicates area being measured
Display Adjustable Emissivity: 0.85, 0.90, 0.95
Selectable C or F display
Low battery indicator
Power supply: 9v battery

Why pay more?

Laser IR Thermometer (Cat. #A493) ...... $49.95 add to cart



Geiger Counter Detects Gamma Rays

Designed for evaluation of ambient dosage of gamma radiation, which can be done by ordinary people in domestic environment (homes, office, food products, construction materials, soil, etc.). Also, the instrument can be used by industrial personnel, working with ionizing sources of radiation. Moreover, the instrument can detect objects, polluted by beta active radioactive nuclides.

The instrument uses a Geiger counter to detect the amount of gamma radiation within 40 sec. and indicates the values in Sv/h and Rem/h on an LCD screen. Registration of every particle is indicated by a click sound, which makes it possible to quickly determine the location of hot spots.

Incorporates the following features: audio alarm with 3 adjustable thresholds, continuous updating of readout in proportion as duration of measurement increases, display illumination, MENU in English. CE. 3 year factory wty. Radex Model RD1503.

Range (ambient dose equivalent)Sv/h 0.05 ... 9.99
Exposure dose rate scaleRem/h5 ... 999
Range energy scalesMeV0.1 ... 1.25
Reproducibility of indications (at confidential probability 0.95), where P is dose rate in Sv/h%15+6/P
Levels of sound-alarm thresholdSv/h0.30, 0.60, 1.20
Rem/h30, 60, 120
Time of calculationsec40 0.5*
Time of indication.continuous
Batteries "AAA" type .2
Time of continuous operation, at leasthour550 **
Outside dimensionsmm105x60x26
Weight (without battery)Kg0.09

On Sale Now! Was $179.95
Low Cost Radiation Monitor (Cat. #A783) ............. 99.95 add to cart
In stock for immediate shipment

Portable Geiger Counter


Digital Readout with History Graph, PC Interface

If you have been thinking about getting a simple low-cost Geiger counter, search no more.

Whether you are checking antiques, testing for safe granite countertops, evaluating your porcelain dishes and bathroom fixtures, or just monitoring soil, air, water, and food for radioactive contamination, this economically priced, super-small device does it all. Portable Geiger Counter

Small enough for your pocket or purse (5x3x1), sensitive enough for background levels, and loaded with useful features

  • Classic Geiger counter clicking sound, which can be on or off
  • Count per minute (CPM) or exposure rate microSievert/hr (Sv/hr) or (mR/hr) readout
  • Range: up to 65,535 CPM (200 microSv/hr or 20 mR/hr)
  • Audible alarm with adjustable threshold
  • Data logging, with date/time stamp (select every second, minute, or hour)
  • USB PC interface and free simplistic software for real-time or delayed downloading and manipulation of your data (Windows XP/Vista/Win7 32 and 64 bits)
  • Adjustable backlight and battery saving features
  • Rechargeable 9V battery included (can also use Alkaline 9V)
  • Useful indoors or out. Can be wall mounted and powered by AC adapter (or vehicle adapter) for continuous monitoring. Detects Beta and Gamma (0.1~1 MeV)
  • Get one before there is an emergency in your area. Great for home, work, or school environments. Nice educational tool as well.

Portable Geiger Counter with Data Logging (Cat. #A430) .............. $149.95 add to cart

What our customers tell us:

Excellent detector at a great price. Took to Washington state on a recent trip and it helped bring peace of mind to a friend living on the coast. His rain water was about double background but we didn't get down to the beach to check other levels.

D.T., Rapid City, SD


Wondering if you need a radiation monitor?

The EPA offers a website showing levels of airborne radiation at various locations in the USA. See how levels have increased in your area.

Click here for more information

Monitor 4


Geiger Counter
Detects Alpha, Beta, Gamma, and X-rays

Radioactivity is everywhere. It occurs naturally and it can be detected. It can also be deadly.

Monitor 4 features easy-to-read analog meter, red light count, anti-saturation circuitry, and audible indicator- all in hand-held convenience. Great for checking for soft X-ray radiation, and for determining back-ground ionizing radiation (granite, porcelain, solar flares, natural radioactivity, etc.)

Check for radioactive contamination of clothing, food, water or imported goods.

Monitor 4 Uses a halogen quenched uncompensated Geiger Mueller tube with a thin mica window. Detects alpha down to 2.5 MeV, 80+% efficiency at 3.6 MeV. Detects beta at 50 keV with 35% efficiency, and 150 keV with 75% efficiency. Detects gamma and X-ray down to 10 keV. Range of 0.02 - 50 mR/hr. Requires 9V battery. 1-year warrantee. Made in USA.

Made in USA Monitor 4 (Cat. #A196)....................$375.00 add to cart
Now in stock!

Now available with metric calibration. Readout in microSieverts/hour.
Made in USA Monitor 4 metric (Cat. #A196-M)....................$375.00 add to cart
Now in stock!

USB Geiger Counter USB Geiger Counter


Perfect for Logging Radioactivity Data to Your PC

A great way to measure and log radioactivity! Watch as background levels fluctuate over the course of a weekend, or bring objects up to the sensor to see if they are emitting more than background. Compact G-M tube sensor plugs into your computers USB port. Intuitive software allows monitoring of BETA and GAMMA radiation levels right away and shows graphically how the levels are changing over time.

Data is collected every 3 seconds and is date and time stamped. Display as CPM, mR/hr, or uSv/hr. Averaging time is selectable from 15 seconds to 10 minutes. No batteries or external power required. Audible event beep (can be disabled in software). There is even an audible alarm which you can set to go off at any level. Includes software CD and cable. Easy set-up. 1 year warranty. Made in USA. Now look at the low price!
Must be connected to computer to work, not a stand alone device.

Screen shot:

USB Geiger Counter Screen Shot

  • Radiation Types: BETA and GAMMA Radiation
  • Measurement Range: 0 to 50 mR/hr
  • Resolution: 0.001 mR/hr
  • Anti-Saturation: 500 mR/hr (minimum)
  • Sensitivity: 450 cpm/mR/hr, dead-time compensated
  • Units (Selectable): mR/hr, R/hr, Sv/hr, CPM (compensated or uncompensated)
  • Detector Window: 30 mg/cm2 x .002 thick
  • Accuracy: 10% Typical, 15% Maximum (Co60)
  • Features:
    - USB Powered (no batteries)
    - LED Flashes with each count
    - Buzzer beeps with each count (can be disabled in software)
    - Audibe alarm (adjustable threshold)
  • Computer Interface: USB Type B Connector
  • Physical Size: 4.00 x 1.25 x 1.00
  • Physical Weight: 1.6 oz. (without USB cable)
  • Accessories: USB Type A to Type B Cable (included)

Made in USA USB Geiger Counter (Cat. #A106) ........ $219.00 add to cart



Geiger Counter
Excellent Sensitivity To Low Level Radiation

Larger detector window and digital readout make this our most sensitive and accurate radiation meter for alpha, beta, gamma and X-rays. Simple to use in basic mode, plus advance features which allow the user to adjust the averaging time, switch from mR/hr to mSv/hr, and output data to computer or data logger. Slide switch offers 3 modes of operation: mR/hr, CPM, total counts. Radioactive Toilet! 4-digit LCD readout, red LED count light and audible tone. Includes padded vinyl case and one year warranty. Requires a 9V battery. Made in USA.
Click here for More Information about this product.
Click here for Software download for this product.

Now with USB port, cable and PC software so you can collect and analyze data on your computer.

Made in USA InspectorUSB (Cat. A196-USB) ......... $580.00 add to cart

halogen-quenched uncompensated GM tube
thin mica (1.4-2.0 mg/cm); effective diameter 45mm
display updates every 3 seconds; averages every 30 seconds or less
CPM: 0 - 300,000
Total Counts: 1 - 9,999,000
mR/hr: 0.001 - 100
microSv/hr: 0.01 - 1000
CPS: 0 - 5000
mR/hr: 15% from 0-50 and 20% from 50-100
CPM: 15% from 0-130,000 and 20% from 130,000-300,000
Dual miniature jack drives CMOS or TTL devices
-10C to +50C
150 x 80 x 30 mm
301 g (excluding 9V battery)

Software screenshot
Inspector USB screen shot

Made in USA InspectorUSB (Cat. A196-USB) ......... $575.00 add to cart

Data Logging Software Kit for Inspector

Use Your Computer To Log, Store And Display Data

Inspector Software

The Observer Software runs on a Windows platform and can be used with the Inspector to record Counts, CPM, and CPS and has the ability to collect, log, and perform statistical analysis on the data received.

The data is displayed on a graph as well as digital and analog on-screen meters and can be saved or printed in various ways including a spreadsheet format. The dwell/count time can be adjusted for each point on the graph. You can also set the length of time for the count. The on-screen meters in the software have adjustable settings as well as a settable alarm in CPM. There are both visual and audio indicators, and you can play the meter click through your PC speakers. Windows 95, 98 ME, XP, NT, 2000 compatible. Includes USB connection cable.

Data Logging Software Kit for Inspector (Cat. #A196-DL) ...... $99.00 add to cart

Don't have a serial port on your computer? You can use a serial to USB adapter.

Inspector EXP

Inspector EXP

Professional Grade Geiger Counter

Designed to meet the requirements of emergency response personnel. It has the same valuable features, small size, and quality of the Inspector with the added versatility of an external probe.

Display: 4 digit liquid crystal display with indicators.
Operating Range: 0.001 to 100 mR/hr or .01 to 1000 Sv/hr
0 to 350,000 CPM or 0 to 5000 CPS
Total/ Timer: 1 to 9,999,000 counts
Averaging Periods:Display will update every 3 seconds. At low background levels, the update is the moving average for the past 30-second time period. The timed period for the moving average decreases as the radiation level increases
Alert Set Range: mR/hr .001 - 50 and CPM 1 - 160,000.
Loudness: 70db @ 1m.
Count Light: Red LED flashes with each radiation event.
Audio Indicator: Internally mounted beeper (can be switched off for silent operation)
Outputs: Dual miniature jack drives CMOS or TTL devices: count to computer or datalogger.

1 year warranty.

Made in USA Inspector EXP (Cat. #A196-EXP) ...... $780.00 add to cart

The following items are available from other websites. We provide this information as a courtesy. These websites have no affiliation with Less EMF Inc. Proceed at your own risk:

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Can't decide which meter is right for you?
Click here to go to the handy Meter Selection Guide.

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