These electrodes are designed for insertion in RADIOMETER mountings or Ingold nonpressurized assemblies 761-351, 761-31, 761-361, and 361CH-31 (12 mm dia.) Sealed, gel-filled, double-junction reference electrodes require no refilling, and offer long-term stability and extend service life. Annular ceramic junction eliminates clogging problems and provides excellent stability. Operating temperature range is 23 to 266°>F (-5 to 130°>C). Order detachable cable separately to autoclave your glass-bodied electrode and vessel as a single unit -- simply detach the cable and place a protective cap over the cable connector before sterilizing.