Ludlum 193

Handheld survey meter

Ludlum 193 – handheld survey meter from Ludlum Measurements. Weight as specified: 1.6 kg (3.5 lbs.), including batteries.

Weight as specified: 1.6 kg (3.5 lbs.), including batteries1

Download product sheet (PDF)All values with references – for tender documents

Specifications checked against the manufacturer’s documents on 2026-10-16

Manufacturer’s product page (opens in a new tab)

Overview

Nuclear power & nuclear technology Defence, security & preparedness Emergency services & first response Environmental monitoring & radiation protection Industry & quality control

Specifications

The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

Detector

Compatible external detectors	Scintillation detectors1

Performance

Linearity	Reading within 10 % of true value1

Measuring range

Measurement range	0 to 5000 µR/hr (0–5 µR/hr scale; other meter scales available)1
Range multipliers	×1, ×10, ×100, ×10001

Electronics & signal

Detector bias	Externally adjustable and variable from 200 to 1500 Vdc1

Power & battery

Power supply	Two standard alkaline "D" cell batteries or NiCd rechargeable batteries2
Battery life and conditions	600 hours1

Mechanical

Dimensions (H × W × L)	16.5 x 8.9 x 21.6 cm including instrument handle1
Weight as specified	1.6 kg (3.5 lbs.), including batteries1

Environment & ratings

Operating temperature	−20 to +50 °C (−4 to 122 °F)3

The data comes from the manufacturer’s published documents. Manufacturers may change specifications; the current configuration and performance are confirmed in the quotation.

Documents

PDFModel 193 MicroR Ratemeter (data sheet)Datasheet · Ludlum

Sources

The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

1
Model 193 microR Survey Meter
Publisher: Ludlum MeasurementsProduct page Specifications tab, 'Compatible Detectors'; Specifications tab, 'High Voltage'; Specifications tab, 'Linearity'; Specifications tab, 'Battery Life' … Checked 2026-10-16
2
Model 193 MicroR Ratemeter (data sheet)
Publisher: Ludlum MeasurementsDatasheet Specifications, 'Power' Checked 2026-10-16
3
Ludlum Model 193 manual
Publisher: Ludlum MeasurementsManual Manual p. 19 (p. 5-1), section 5, Environmental Conditions for Normal Use Checked 2026-10-16