EP 0756706 A4 20000712 - CONTINUOUS PARTICULATE EMISSIONS MONITOR CALIBRATOR
Title (en)
CONTINUOUS PARTICULATE EMISSIONS MONITOR CALIBRATOR
Title (de)
KALIBRIERVORRICHTUNG UND MONITOR FÜR KONTINUIERLICHE TEILCHENEMISSION
Title (fr)
DISPOSITIF DE CALIBRAGE ET DE CONTROLE CONTINUS DES EMISSIONS DE MATIERES PARTICULAIRES
Publication
Application
Priority
US 9404492 W 19940422
Abstract (en)
[origin: WO9529399A1] A device (10) and method for monitoring particulate (22) flowing through a conduit (20) has a transmitter (16) and a receiver (18) positioned in optical alignment on opposite sides of the conduit (20). A light beam (50) is transmitted across conduit (20) from the transmitter (16) to the receiver (18). Particulate (22) flowing through conduit (20) interrupts light beam (50) causing a signal to be generated from which particulate concentration is determined. A calibrator assembly (40) has a motor (64) adapted to move a filter (100) having a selected percentage opacity within the path of light beam (50). Movement of the filter (100) modulates light beam (50) and a signal corresponding to the concentration associated with the percentage opacity is generated.
IPC 1-7
IPC 8 full level
G01N 21/53 (2006.01); G01N 15/02 (2006.01)
CPC (source: EP)
G01N 21/534 (2013.01); G01N 2015/0222 (2013.01)
Citation (search report)
- [A] GB 2243681 A 19911106 - GALAI LAB LTD [IL]
- [A] US 5028790 A 19910702 - MCGOWAN GERALD F [US], et al
- [A] EP 0108605 A2 19840516 - UNIV LONDON [GB]
- See references of WO 9529399A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9529399 A1 19951102; EP 0756706 A1 19970205; EP 0756706 A4 20000712
DOCDB simple family (application)
US 9404492 W 19940422; EP 94916559 A 19940422