LUDLUM 78-1 Stretch Scope Survey Meter (1 μSv/h ~ 9999 mSv/h; 377.2 cm)

Working environment: splashproof shields for outdoor use (environmental rating IP52)

Detectors: two energy-compensated GM tubes

Energy response: within ±25% of true value from 60 keV–3 MeV

Analog meter dial: 0–10k, 4-decade logarithmic

Display: 4-digit LCD with 1.3 cm (0.5 in.) digits

Display range: 000.0–999.9 with Sv indicator (R display also available)

Measured ranges: 0.001 mSv/h–9.999 mSv/h or 1 mSv/h–9.999 Sv/h

Range selection: 2-position toggle switch for µSv/h or mSv/h

Backlight/reset: momentary 2-position toggle for preset backlight time or meter/display zeroing

Linearity: within ±10% of true value

Audio: built-in click-per-event audio with on/off switch

Response: depends on count rate; typical FAST 4–25 seconds, SLOW 4–60 seconds (10% to 90% of final reading)

Power: two D-cell batteries (sealed in handle)

Battery life: typically 250 hours with alkaline batteries (low battery shown on display)

Meter: 6.4 cm (2.5 in.) arc, 1 mA analog type

Construction: aluminum housing with beige powder coat; polished stainless-steel telescoping pole

Temperature range: −20 to 50 °C (−4 to 122 °F)

Size: 12.2 × 10.9 × 105.9 cm retracted; 377.2 cm extended (4.8 × 4.3 × 41.7 in. retracted; 148.5 in. extended)

Weight: 2.9 kg (6.4 lb), including batteries

Options:

Case: water-, crush-, and dust-proof wheeled case with custom foam pads (PN 4272-444)

Headphone: dual volume controls, padded ear cups, adjustable head strap, 3 m (10 ft) cable (PN 47-3708)

Datasheet

Manual