(1)The Leak detection filter must have air volume has been measured,in the design wind speed running between 80% ~ 80%.
(2)In the same supply air plane when Ann has many sets of filters,permission on the structure,suitable for use at a time exposure 1 method for determination of the filter.
(3)When several or all of the filter must be exposed to the aerosols,in order to cause mixing to all filters,appropriate fan suction side or front these filters in the main introduction of leak detection in aerosols.immediately in front of the tested filters to determine concentrations of windward side.
(4)For high efficiency filter,when the leak detection instrument is logarithmic scale,upper side of the aerosol concentration should be 104 times better than the minimum meter calibration,when the leak detection instrument is linear scale,upper side of the aerosol concentration of about 80 ~ 100 mu g/L,Leak detection instrument should be 0.001 ~ 100 mu g/L of the measurement range
Elitech(UK) Halogen Leak Detector UHLD-200+
HLD-200 is a newly high performance intelligent halogen leak detector. The new shell designed with LED displaying is elegant, easily-carried, easy operation, visual and clear display, etc.


Visual display and single light diode displays the leak degree in large range in the form of "gradually lights the light".
Providing 6 levels of sensitivity to set the real-time cycle adjustment
Easy operation with pushbutton
Battery checked function with tricolor display
Detect all kinds of halogenated refrigerants.
The high effective true mechanical pumping provides positive airflow through sensing tip, which can improve the sensitivity and response speed.

Applicable areas:

1 The leak-detect in vocation of freeze, refrigeration, and air-conditioner
2 The leak-detect for air-conditioner in the car
3 It will respond to all halogen gases (including Chlorine and Fluorine). Including CFCS e.g. R12, R11, R500, R503 etc.
HCFCS e.g. R22, R123, R124, R502 etc
HFCS e.g. R134a, R404a. R125 etc.
And other mixtures, e.g. AZ-50, HP62, MP-39, etc.
4 Detect Ethylene Oxide gas leaks in hospital sterilising equipment (it will detect the homogenate carrier gas.
5 Detect SF-6 in high voltage circuit breaks
6 Detect most gases including Chlorine, Fluorine and Bromine (halogen gas)
7 Detect cleaning agents used in dry
cleaning applications such as perchloroethyl. 8 Detect halogen gases in fire-extinguishing system.