Generally, it is assumed that lead-free and thus RoHS conformed sensors of IT Dr. Gambert GmbH do not differ in form(-factor), handling  as well as in their chemical and electrical properties so much compared to conventional leaded sensors: in other words lead-free sensors can be considered compatible with regard to the former. In fact itg is ensuring immediate interchangeability as it is capable of offering lead-free oxygen sensors as real drop-in replacements to the former leaded sensors.


The table below depicts in what respects the lead-free sensor advantageously sets apart and where it provides equivalence to the leaded version.


As for the electrical impedance load it should be more than 1 MOhm.

We use an alkalescent electrolyte which can be classified safe in all matters. That meets non-polluting disposal expectations.


In regard to temperature, pressure, humidity and storage conditions the usual standards apply like for the leaded sensors. Output voltage at air as well as baseline are consistent to the known output values of leaded sensors.


Further improvements have been made on the cross-interference of the lead-free sensors. There are significantly minor cross-interferences to acid gases such as CO2, at high concentrations of acid gases, such as CO2. The sensors practically do not respond to acid gases.

Characteristics Lead-free Leaded
Compatibility mechanical
Sensor side view with typical outer housing (white cap, white thread M16x1) and approximate dimensions.
electrical recomended
load resisistor: > 1 MΩ
Ioad resistor: > 1 kΩ
chemical weak alkaline electrolyte strong alkaline electrolyte
Handling operating temperature no change, typically 5-45 °C
operating pressure no change, typically 700-1250 hPa
operating humidity no change, 0-100% RH, non-condensing
storage conditions no change, typically 5 to 30 °C, 0-98% rH, typically shelf life about 6 months possible
Basic Characteristics Initial output voltage @ air no change typically 9-15 mV
N2-baseline no change, typically < 0.3 Vol.% O2
lnterferences anaesthetic agents according to DIN EN ISO 80601-2-55
CO2 none
@ 5% CO2 bal. N2
< 0.25 Vol.%
@ 7 % CO2 bal. N2
IT Dr. Gambert GmbH .: Hinter dem Chor 21 .: 23966 Wismar .: Germany