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Technical Tips

YSI Service Kits

Membrane Model #
(Item #)
Type, Thickness, Material Can be used with Price
DY-858 Stretch Membrane, 2.0 mil Teflon Probes: 5719, 5739, and 5750 when used with a model 58 instrument only. 30.00/ea
DY-850 Stretch Membrane, 1.0 mil Teflon Instrument: 55
Probes: 5719, 5739, 5750, and Rapid Pulse
29.50/ea
DY-851 Stretch Membrane, 0.5 mil Teflon Probes: 5719, 5739, and 5750 when used with a model 58 instrument only. 37.00/ea
YSI-5906 Black Cap Membrane, 1.0 mil Teflon Instrument: 85, 550, 556 MPS, and Pro Plus with a
Polarographic sensor
46.80/ea
YSI-5908 Yellow Cap Membrane, 1.25 mil Polyethylene (PE) Instruments: DO200, 550A, and 556
Probes: Pro Series Polarographic sensors
46.80/ea
YSI-5909 Blue Cap Membrane, 2.0 mil Polyethylene (PE) Instruments: 556
Probes: Pro Series Polarographic
48.60/ea
YSI-5912 Black Cap Membrane, 1.0 mil Teflon Pro Series Galvanic sensor when used with a Pro Plus instrument only 54.00/ea
YSI-5913 Yellow Cap Membrane, 1.25 mil Polyethylene (PE) Pro Series Galvanic sensors 48.60/pk
YSI-5914 Blue Cap Membrane, 2.0 mil Polyethylene (PE) Pro Series Galvanic sensors 50.40/pk

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