SURFACE CONTAMINATION MONITOR

Model # TBM-3SR-D

FEATURES:

* SENSITIVE TO ALPHA, BETA & GAMMA

* ONE HAND OPERATION

* DIGITAL DISPLAY

* BUILT-IN SPEAKER

* ANTI SATURATION CIRCUIT

* LARGE 2" PANCAKE DETECTOR

* BETA SHIELD/WINDOW PROTECTION 

DESCRIPTION: Small Digital Ratemeter with built -in 2" 
diameter pancake tube and speaker. Reads out in mR/hr 
(or counts per minute). Thin window recessed and 
protected by sturdy grill. Additionally TBM-3SR-D has 
sliding methacrylate beta shield which also acts as 
additional protection for thin GM tube window. 
Instrument will see alpha, beta, and gamma radiation. 
Anti saturation circuit will not fall below full scale 
in high fields. Tested to100 R/h.
 
APPLICATION: Its small size, light weight, one hand 
operation, and large detector area make this a very 
useful monitor for surveying bench tops or checking 
hands, clothes, and fingertips for almost any 
radioactive contamination. Excellent for Fire 
Department, Ambulance, Police, First Response, and U.S. 
Custom Personnel use for surveying people, cars, 
luggage, surface of rooms, etc...
 
Experts Recommend TBM-3SR for Fire Department use on 
every fire engine.

 <Graphic file:tbm-3-imga.jpg>

<Graphic file:tbm-3srd-img.jpg>

 TBM-3SR-D (Shown With Sliding Beta Shield)
 

T$_{\textrm{A}}$                                   TECHNICAL ASSOCIATES                                   
------------------------------------------------------------------------------------------
  7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103   
                                 www.tech-associates.com                                  


$Revision: 1.2 $

SURFACE CONTAMINATION MONITOR

Model # TBM-3SR-D

SPECIFICATIONS:

Digital Display: Large 6 digit LCD Display.
(Optional lighted LCD Display.)

Ranges: 0.01 to 100.00 mR/hr.
(Optional: 0 to 100,000cpm.)

Front Panel Switches: Power: On/Off.
Battery Test.

Detector: T-1190 "pancake GM tube"

Diameter: 2 inches (5cm).

Window Diameter: 1-3/4 inches (4.5 cm).

Window Thickness: 1.5 mg/cm$^{2}$

Quench Gas: Halogen for long life.

Background: Typical <50 cpm. Thin Profile of tube 
(13mm) gives low background.

Efficiency: 100% for all Betas and Alphas that have the 
energy to penetrate the thin window. Gamma sensitivity 
nominal is 3,500 cpm/mR/h (based on Cs$^{\textrm{137}}$). 

Physical dimensions: 3" Wide x 5-1/4" Long x 2-1/4" High. 
Excluding knobs and handle.
(7.6 cm x 13.3 cm x 6 cm)

Beta Shield: Methacrylate 0.125", 3.1 mm.

Calibration: Single master calibration pot as well as 
individual cal pots for each range.

Power: 9 volt "transistor" battery; Eveready 1222, or equivalent.

Battery Life: 100 hours in normal operation.

Handle: Swivel type, polished anodized aluminum.
(Optional Detachable Handle TBM-3SR(DL) Upon Request)

Weight: 22 oz. (625 grams).

Optional: Lighted LCD Display.
Detachable Handle TBM-3SR-D(DL). 

See "Beta Pancake Response" specification (BETA PANCAKE RESPONSE)

Fire Fighters: TBM-3SR-D is available with the mR/hour 
Scale, a single Counts Per Minute Scale or mR/hr Scale, 
or Both Scales (Upon Request).

T$_{\textrm{A}}$                                   TECHNICAL ASSOCIATES                                   
------------------------------------------------------------------------------------------
  7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103   
                                 www.tech-associates.com                                  


$Revision: 1.2 $