This is a replacement membrane cap for a Dissolved Oxygen Probe. The membranes on DO Probes have a limited lifespan, the duration of which varies with frequency and care of use. One extra membrane cap is included with the DO Sensor.
Due to recent changes in U.S. trade policy, new tariffs are being implemented that impact our products. This means a surcharge of 10% will be applied to orders received starting May 12th, with the exception of software and books. Learn more.