STS Ludlum - Model 12 - Simulated Analogue Contamination Meter - Brochure

The STS Model 811 consists of a real Ludlum Model 12 ratemeter, but with additional STS electronics installed within the case and powered from the Model 12’s battery supply. The instrument operates using an STS simulated probe containing a gas detection head which detects the presence of the stimulant placed on surfaces and clothing, the resultant reading is displayed as counts per minute on the Ludlum display.