Description:

The J.U.M. Engineering PreFilter® is an efficient, all heated and low pressure drop filter for removing solids from a gaseous sample. The Model 1128 utilizes an all stainless steel filter and an all stainless steel valve in a thermostatically controlled oven to prevent the loss of high molecular weight hydrocarbons or condensation of water.

The permanent sample filter is cleaned by backpurging. An automatic programmable filter backpurge system is available as an option.

• Stack gas hydrocarbon emissions monitoring
• Removing particles from a gaseous sample
• Diesel raw exhaust analysis
• Gasoline raw exhaust analysis
• Stationary diesel engine exhaust analysis

1 Technical Data
Sample filter material	All stainless steel
Filter pore size	2µm
Filter surface area	13.000 mm2 (20.1 square inches)
Sample valve	All stainless steel/Viton®
Purge air valve	All brass
Calibration gas valve	All brass, or to be specified
Optional sample pump	All stainless steel/Viton® diaphragm
Oven Temperature	190°C (374 °F)
Power Requirements	230VAC/50Hz, 1250W (115VAC/60Hz, 1250W)
Ambient Temperature	5-43°C (41-110°F)
Dimensions (W x D x H)	260 mm x 400 mm x 155 mm
Weight	5 kg (11 lbs) w/o optional pump assembly
Viton® is a registered trademark of DuPont Dow Elastomers

1 Available Options
APO 11	External automatic programmable backpurge timer for the sample filter
COS 11	Overflow calibration system for EPA CFR 40, Method 25A
PP 11	Internal heated sample pump, 2 l/min capacity @ operating temp.
PTO 11	Temperature sensor with signal output (10 mV/°C) for oven temp.