1. Introduction
  2. Data Sheet
  3. Accessories
  4. Warranty
  5. Pictures


The TM372++ is an upgraded version of the TM372 Sample Counter. Along with the ability to count alpha particles, the TM372++ is also equipped with a Geiger-Müller tube for detecting gamma radiation and an internal pump with an adjustable flow rate for collecting radon progeny and dust samples. In addition to these new functions, the TM372++ can do an automated count using the Rolle method and communicate with a Bluetooth enabled device. This Bluetooth connection allows the user to not only control the TM372++ with a phone, but also directly import measurements into a database.

The device has also been upgraded to include a membrane switch keypad and a larger 5-digit LED. The keypad now allows the user to enter a range of count times, display the time remaining during the count, toggle the display between alpha and gamma readings, and much more. Read the TM372++ User's Manual for a more detailed description of the device.

Data Sheet

Features and Specifications:

Device TM372++
Dimensions 21.6 cm (8 1/2") x 13.5 cm (5 3/8") x 18.5 cm (7 5/16")
Weight 2.2 kg (4.8 lbs)
Sample Holder Sizes 25 mm, 37 mm, and 47 mm
Display 5 Digit 7-segment LED
Display Range Alpha: 0 to 167 x 105 counts
Gamma: 0 to 99999 µSv/h
Count Time Range 1 second to 999 minutes and 59 seconds
Controls Membrane switch buttons
Power Supply 5 AA internal rechargeable 2300 mAh NiMH batteries
15 to 20 hours operating time
Charger 9V, 660 mA
16 hour charge time
Air Pump 1.0 L/min - 2.3 L/min (Adjustable)
Detector Alpha: Photomultiplier tube (B38B01W)
Gamma: Geiger-Müller tube (LND71322)
Gamma Sensitivity 0.75 cps/(µSv/h)


The TM372++ includes the following:

  • 3 - ZnS alpha detector spares
  • 1 - 9V AC battery charger
  • 1 - 25 mm sample holder (two piece unit)
  • 1 - 37 mm sample holder (two piece unit)
  • 1 - 47 mm sample holder (two piece unit)
  • 1 - Protective operational leather carrying case with shoulder strap
  • 1 - 3/8" clear tubing
  • 1 - User's manual


The TM372++ is guaranteed against defective materials and workmanship for a period of one year from the date of purchase. Warranty covers labour and part replacement costs but does not include the cost of shipment to EIC. Return shipments for repair are to be made only after having received approval by EIC. No warranty is made beyond repair, replacement, or refund of the purchase price. In no way shall EIC's liability be in excess of the purchase price of the product. EIC assumes no liability for loss, damage, or delay during delivery. Additional insurance on shipments is the responsibility of the purchaser. EIC will conduct repairs as quickly as possible according to the purchaser's needs, but is not responsible for delays or any losses incurred by the purchaser as a result of delays.


The TM372++ is measuring an effective dose rate of 1.55 µSv/h received from an old radium dial watch.