Technical Tips

YSI Service Kits

Membrane Model #
(Item #)
Type, Thickness, MaterialCan be used withPrice
DY-850Stretch Membrane, 1.0 mil PTFEInstrument: 55
Probes: 5719, 5739, 5750, and Rapid Pulse
Check Current Price
DY-851Stretch Membrane, 0.5 mil PTFEProbes: 5719, 5739, and 5750 when used with a model 58 instrument only.Check Current Price
YSI-5906Black Cap Membrane, 1.0 mil PTFEInstrument: 85, 550, 556 MPS, and Pro Plus with a
Polarographic sensor
Check Current Price
YSI-5908Yellow Cap Membrane, 1.25 mil Polyethylene (PE)Instruments: DO200, 550A, and 556
Probes: Pro Series Polarographic sensors
Check Current Price
YSI-5909Blue Cap Membrane, 2.0 mil Polyethylene (PE)Instruments: 556
Probes: Pro Series Polarographic
Check Current Price
YSI-5912Black Cap Membrane, 1.0 mil PTFEPro Series Galvanic sensor when used with a Pro Plus instrument onlyCheck Current Price
YSI-5913Yellow Cap Membrane, 1.25 mil Polyethylene (PE)Pro Series Galvanic sensorsCheck Current Price
YSI-5914Blue Cap Membrane, 2.0 mil Polyethylene (PE)Pro Series Galvanic sensorsCheck Current Price

   *Newer membrane caps are made of polyethylene notated as PE in the table.
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