HALO Users Manual
Revision G
4
2 Specifications and Drawings
2.1 Specifications
Table 2-1 HALO-H
2
O Trace Gas Analyzer Specifications
Performance
Lowest Detection Limit
2 ppb
Sensitivity
1 ppb
Accuracy
4% of reading or +/- 1 ppb if greater
Speed of Response
(typical)
Dry down response from 1ppm intrusion to 90% of final value in
<3min
Wet up response to 1ppm intrusion – 90% of final value in <2min
Operating Range
0 – 20000 ppb
Environmental Conditions 10º - 40ºC - - - 30% to 80% R.H. Non-condensing
Storage Temperature
-10°C to 50°C
Technology
Method
Cavity Ring-Down Spectroscopy (CRDS)
Laser Light Source
Continuous Wave (CW) Near-IR diode laser
Approvals
CE Marked – LVD and EMC approved
Patents
U.S. Patent # 5,528,040
U.S. Patents Pending
Gas Sample Conditions
Sample Inlet Pressure
10 – 125 psig (1.7 – 9.6 bara)
Sample Outlet Pressure
< 2.0 psig back pressure (or vacuum)
Flow Rate
0.5 to 1.8 slpm depending on gas type
Sample Gases
Ar, H
2
, HBr, HCl, He, N
2
, O
2
, SF
6
, CF
4
, Cl
2
, CO
2
, CDA, and CO
(contact Tiger Optics for additions to the list of sample gases).
Sample line temperature
Up to 60ºC
