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- Epoxy combination Nitrogen Oxide ion selective electrode for use in air and stack gases, biological samples, and other aqueous solutions
- Refillable, gas-sensing reference; Nitrogen Oxide: 230 to 0.18 ppm, 5 x 10-3 to 4 x 10-6M
- Includes replacement 20 loose membranes
- 3 ft connecting cable with BNC connector