Radiation/Contamination Survey Meter

Models 3500/3510

The Model 3500 and 3510 survey meters utilize an internal, energy compensated detector for measuring X and gamma radiation. Both models have 4 separate ranges, with each range independently calibrated to ‐ 15%. A calibration pot for each range is externally accessible, making calibration easier and more accurate.

The meter faces for the Model 3500 and 3510 are of easy to read, linear design with reduced geotropism, so more accurate measurements are possible in all orientations of the meter. A built in display light is provided that will illuminate the scale at the touch of a button.

An optional external end window GM Probe (Model 3089) is available for the Model 3500 & 3510. This converts either model into a contamination monitor for detecting alpha, beta and gamma radiation. The external probe overrides the internal detector when in use. With the GM Probe, the 3500 has a range of 0-300K cpm and the 3510 has a range of 0-600K cpm.


FEATURES:
• Rugged, lightweight
• Linear, easy to read meter face
• Reliable, accurate readings
• Strong spring belt clip



OPERATING CHARACTERISTICS 2
Radiation Detected: Gamma and X-Rays
Accuracy:
Energy Dependency		 ‐15% reffered Cs137
‐30% 40 keV to 1.2 MeV
Operating Range:
x1
x10
x100
x1000
3500
0 to 3mR/h
0 to 30mR/h
0 to 300mR/h
0 to 3R/h

 3510
0 to 30mR/h
0 to 300mR/h
0 to 3R/h
0 to 30R/h		 3500Sv
0 to 30µSv/h
0 to 300µSv/h
0 to 3mSv/h
0 to 30mSv/h
 3510Sv
0 to 300µSv/h
0 to 3mSv/h
0 to 30mSv/h
0 to 300mSv/h

 With External Probe
0 -300 or 600 cpm
0 -3k or 6k cpm
0 -30k or 60k cpm
0 -300k or 600k cpm
Exposure Rate Limit: 100 times full scale reading
Warm Up Time: No warm up time required
Response Time: x1 (9.0 seconds) / x10 (5.4 seconds) / x100 (3.6 seconds) / x1000 (2.0 seconds)
Environmental Effects:
 Temperature Range: 14━F to 122━F (-10━C to 50━C)
Temperature Dependence: Less than 15% over entire range
Relative Humidity Range: Less than 15% up to 95% relative humidity (non-condensing)
PHYSICAL CHARACTERISTICS 2
Detector Type: Energy Compensated halogen quenched GM Tube Model-Gm Tube/ 3500-1-5309/3510-1-5318
Detector Voltage: 550V DC
Readout:
Visual
Audio
Linear, taut band panel meter
Internally mounted speaker and optional earphone
Power:
Battery
Battery Life		 9 volt battery (NEDA 1604-A or equivalent)
200 hours @ 10 mR/h hour
Less than 10%
Connectors: 2.5mm subminiature phone jack (earphone) / 3.5 miniature phone jack (probe)
Control:
Switch:
Rotary switch (Off, Batt. x 1000, x100, x10, x1) / Pushbutton switch for back light
Dimensions:
Width
3.1" (80mm)
 Length
5.2" (131mm)
 Thickness
1.4" (36mm)

 Net Weight (with battery)
9.5 oz.
(271 gm)
ACCESSORIES 2
Included: Audio: Silencer Plug / Mounting: Spring Steel belt clip and Lanyard ring
Optional:
External GM Probe:

Carrying Case:
Earphone:

Model 3089 - Detects alpha 2.3 MeV,
Beta 40 keV, Gamma and X-Ray 5 keV
Model 1887x
Model 3023		 Efficiency:

　



Relates only to Model 3089

 Tc99
Cs137
Pu
Sr 90/y90
 6%
10%
9%
23%