Vaisala HM34 - Manual (Page 6)

4
Chemical tolerance of the humidity sensor (HUMICAP
®
)
Long-term exposure of the sensor to certain chemicals and gases
may shorten its life. The following list gives suggested maximum
ambient concentrations for some typical chemicals:
1. Organic solvents: 1000...10 000 ppm (typ.)
2. Aggressive chemicals:
(e.g. strong acids such as
SO
2
,H
2
SO
4
, H
2
S, HCl, Cl
2
etc.) 1...10 ppm (typ.)
3. Weak acids: 100...1000 ppm (typ.)
4. Bases: 10 000...100 000 ppm (typ.)
Detailed information on allowed concentrations are available on
request from your Vaisala representative.
4. SPARE PARTS AND ACCESSORIES
Part no.
HUMICAP
®
H-sensor 15202
Temperature sensor Pt 100
(1/3 DIN 43760B) 10429
Sintered filter 133 µ m 0195
Plastic grid 6221
HMK11 humidity meter calibrator
Battery IEC 6F22
0332