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Model 26

Integrated Frisker

Part Number: 48-3885

Features

Integrated, Lightweight Design Simplifies Frisking
High-Impact Plastic Housing with Water-Resistant Rubber Seals
Employs Standard 15.5 cm² GM Pancake Detector
RATE, MAX, and COUNT Operating Modes
Simple Two-Button Operation
Count Rate and Scaler Alarms
Automatic Display Backlight
Comfortable Non-Slip Grip
Detector Cover, Lanyard & Wrist Strap Included

Unlike other meter and detector combinations that require two-handed operation, the Model 26 combines the meter electronics and detector into a single, easy-to-use tool, simplifying the process of detecting radioactive contamination on people and objects. This optimized configuration incorporates a standard 15.5 cm² pancake GM probe and a large, auto-ranging LCD with automatic backlighting into an ergonomic housing with two button controls, allowing for one-handed operation.

Three modes of operation are available – RATE, MAX, and COUNT – which can be selected by pressing the MODE button. RATE mode displays the current count rate in either cps or cpm units. MAX mode captures the highest count rate detected; this is useful for finding a peak rate or for frisking when the display is not visible. COUNT mode allows the user perform a scaler count for a predetermined time, up to 20 minutes.

Other features include “click” audio and user-settable count rate and scaler alarms. The instrument body is made of high-impact plastic, and water-resistant construction allows the instrument to be used outdoors. A wrist strap and lanyard are included for keeping the instrument close and secure. The instrument is powered by two alkaline AA batteries with a battery life of up to 1000 hours.

Specifications

Detector	Pancake GM detector, stainless steel screen (79% open)
Window Area	Active: 15.51 cm² (2.4 in²) Open: 12.26 cm² (1.9 in²)
Efficiency	Alpha: ²³⁹Pu - 11% Beta: ⁹⁹Tc - 14%; ³²P - 32%; ¹⁴C - 2%; ⁹⁰Sr/⁹⁰Y - 22%; ¹²⁵I - 0.2% Gamma: 5.5 cps per μSv/hr (3300 cpm per mR/hr) [¹³⁷Cs]; ^99mTc - ≤ 1%
Energy Range	16.3 keV to 1.3 MeV
Display	3½ digit LCD with large 12.7 mm (0.5 in.) digits, low battery indicator, MAX, ALARM Units: cpm, cps
Display Range	0.1 cps to 1.99 kcps 1 cpm to 99.9 kcpm
Linearity	±10%
Backlight	Built-in ambient light sensor automatically activates low-power LED backlight, or may be configured for 'Continuous On' operations (will reduce battery life)
Controls	ON / OFF / QUIET: Press to turn ON; Tap to alternate between click audio and QUIET; Hold for OFF MODE: Alternates between NORMAL (count rate), MAX (captures peak rate), and SCALER (user-selectable preset count time from 0 to 20 min.).
Response Time	User-selectable from 1 to 60 seconds, or auto-response rate FAST or SLOW
Resolving Time	Approximately 100 µs as defined by IEC 60325
Alarms	Count rate and scaler alarm setpoints adjustable over the display range
Overload Protection	High rate saturation protection prevents false display of lower count rates, indicated by flashing display and audio alarm
Loss of Count Protection	After 60 seconds of no pulses from detector, unit will flash a zero reading and trigger alarm audio
Click Audio	Greater than 60 dB at 0.6 m (2 ft)
HV Testpoint	Accessible by removing battery cover, allows HV measurement and pulse injection for calibration using optional cable (see Options)
Temperature Range	-20 to 50 °C (-4 to 122 °F) May be certified for operation from -40 to 65 °C (-40 to 150 °F)
Environmental Rating	NEMA 3 / IP 53
Power	Two “AA” batteries
Battery Life	Approximately 1000 hours of operations (as low as 500 hours with backlight configured for 'Continuous On'), 16-hour low battery warning
Construction	High-impact plastic with water-resistant rubber seals and separate battery compartment
Distance from Surface Plane to Grill	0.32 cm (0.125 in.)
Size (H x W x L)	4.6 x 6.9 x 27.2 cm (1.8 x 2.7 x 10.7 in.)
Weight	0.45 kg (1.0 lb)

Options

Option	Description	Part Number
Protective Cover with Tether	Adds tether to the detector protective cover to keep attached to instrument when cover is not in use.	4519-041
Headphone Jack	Adds headphone jack to instrument.	4498-538
Canvas Holster	Canvas holster with belt clip for Model 26 Series instruments.	2312577
Model 180-28	Sample holder for Model 26-Series friskers.	47-3948
Calibration Cable	Allows HV measurement and pulse injection into any Model 26 family of instruments (excluding the Model 26S) from 2019 and later. 99 cm (39 in.) long, C to test pin.	8303-1044
Extendable Pole	A lightweight pole with 5 telescoping sections and an adjustable clamp to hold a Model 26 Series Frisker. Useful to access high, low, or other hard to reach places. Length: 0.55 m (1.8 ft) collapsed, 1.5 m (4.92 ft) fully extended	4519-077
Transport & Storage Case for Model 26 and Extendable Pole	Rugged, waterproof, airtight, hard-shell case with dense foam padding to hold Model 26 and extendable pole.	2311064