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.

Compatibility

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

Electricity

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.

Handling

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.

Interferences

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	recommended 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