COMBINATION pH/ORP (Redox) SENSOR - Sensor for use in profiling mode only, 1200 meter depth capability. Includes plastic soaker bottle, KCl soaker solution. and complete documentation.
Replaceable pH probe is permanently sealed & is supplied with soaker bottle attachment that prevents reference electrode from drying out during storage. Soaker solution is pH 4 buffer solution saturated with KCL.
SBE 27 can be ordered in two ways:
- By itself; consult Sea-Bird to order interface cable or mount kit separately, if needed.
- As an option in SBE 9plus, 19plus V2, or 25plus Auxiliary Sensor Options, complete with sensor, CTD interface cable, & mount kit.
Sea-Bird does not recommend use of pH or pH/ORP sensor for moored applications; see Application Note 76: pH or pH/ORP Sensors and Moored Applications.
|SBE 27 Connector Selections — MUST SELECT ONE
Wet-pluggable connectors may be mated in wet conditions. Their pins do not need to be dried before mating. By design, water on connector pins is forced out as connector is mated. However, they must not be mated or un-mated while submerged. Wet-pluggable connectors have a non-conducting guide pin to assist pin alignment & require less force to mate, making them easier to mate reliably under dark or cold conditions, compared to XSG/AG connectors. Like XSG/AG connectors, wet-pluggables need proper lubrication & require care during use to avoid trapping water in sockets.
Note: SBE 27 uses 6-pin AG-306 or MCBH-6 connector; photos are for illustration of differences between XSG/AG and MCBH connectors.
||Wet-pluggable (MCBH) connector
|SBE 27 Endcap Selections — MUST SELECT ONE
||Straight endcap (for vertical mounting)
||Photo at top shows straight endcap. SBE 27 must always be mounted with pH probe in an approximately vertical orientation, because bulb at bottom is filled with a KCl solution, and needs to stay filled while in use. Deviation from vertical by some degrees will not affect data, as long as bulb remains filled. Right angle probe configuration is typically required for applications where CTD is mounted horizontally (for example, in extension stand below SBE 32 Carousel Water Sampler) & SBE 27 is mounted to CTD.
||Right angle endcap (for horizontal mounting)
|SBE 27 Spares & Accessories
||Interface cable, SBE 27 to 9plus, AG/RMG connectors, 0.8 m (DN 31749)
||These are cables to interface SBE 27 to Sea-Bird CTDs. Order cable to match CTD and to match connector type.
||Interface cable, SBE 27 to 9plus, wet-pluggable connectors, 0.8 m (DN 32844)
||Interface cable, SBE 27 to 19plus / 19plus V2 / 25 / 25plus, AG/RMG connectors, 1.1 m (DN 31749)
||Interface cable, SBE 27 to 19plus / 19plus V2 / 25 / 25plus, Wet-pluggable connectors, 1.1 m (DN 32844)
||Plastic soaker bottle for pH probe
||Soaker bottle filled with soaker solution comes with SBE 27; this is spare.
||pH sensor O-ring kit
||Spares kit includes 1 each of:
- 231004 Backup ring for LS021 L-seal (end cap to housing seal)
- 30072 O-ring, Parker 2-017 N674-70 (XSG connector seal)
- 30097 O-ring, Parker 2-111 N674-70 (sensor to end cap seal)
- 30806 L-seal, LS021 (end cap to housing seal)
||pH electrode (prepped for installation, document 67072)
||Electrode & electrode guard come with SBE 27; these are spares.
||pH electrode guard
||KCl soaker solution, 500 ml bottle
||Soaker solution is pH 4 buffer solution saturated with KCL. When SBE 27 is not in use, place plastic soaker bottle over pH electrode to prevent loss of internal electrolyte & resulting change in sensor performance. Soaker bottle filled with soaker solution comes with SBE 27; this is spare solution.
||Zinc anode ring