YSI 58 - Manual (Page 7)

SECTION 3 PREPARING THE PROBE
3.1 CHOOSING THE CORRECT PROBE
Five different YSI oxygen probes may be used with the YSI 58 Meter.
¾ YSI 5239 is designed for field use with cable lengths of 10, 25 or 50 foot.
¾ YSI 5905 is a self-stirring BOD bottle probe.
¾ YSI 5739 is designed for field use and may be used with or without a stirrer. A 5740 probe cable
or 5795A stirring cable is required for use with the 5739 probe. YSI 5795A has a dual-purpose
cable to which both stirrer and probe are connected.
¾ YSI 5750 is a BOD bottle probe with no stirrer.
¾ YSI 5718 is designed for field use with no pressure compensation and has a permanently attached
cable.
3.1.1 YSI 5239 DO FIELD PROBE
The YSI YSI 5239 probe is used for measuring dissolved oxygen in the field. It features cap
membranes for easy membrane replacement (YSI 5906 membrane caps). The probe is rugged, with
the DO and temperature sensors enclosed in a heavy-duty probe guard. A 10, 25 or 50 foot cable is
directly connected to the probe body making it waterproof. A 5-pin MS connector at the end of the
cable makes the 5239 fully compatible with all YSI 50 series DO meters retaining the accuracy of the
system. The 5239 has been optimized for YSI meters which have a microprocessor for sampling and
processing data, such as YSIs 50B and 52.
NOTE: The 5239 probe is shipped dry. A shipping membrane was installed to protect the electrodes.
A new membrane cap must be installed before first use.
3.1.2 YSI 5905 BOD PROBE
The YSI 5905 BOD (Biochemical Oxygen Demand) probe is used for measuring dissolved oxygen in
all popular size BOD bottles. This probe features a self-stirring probe and an easily replaced
membrane cap and a refurbishable electrode system.
IMPORTANT: Intended Use
The 5905 probe is intended for laboratory use, not field use. It is not waterproof and should never be
immersed past the taper on the stem of the probe.
YSI Incorporated YSI 58 DO Meter 3