YSI 5239 Dissolved Oxygen Probe - Manual (Page 5)

1
I NTRODUCTION
The YSI Model 5239 probe is used for measuring dissolved
oxygen in the field. It is the first field probe that 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 micro-processor
for sampling and processing data, such as YSI Models 50B
and 52. The system specifications, when used with a YSI 50
Series DO meter, are as follows:
P ROBE C ONFIGURATION
•
Cathode: Gold
•
Anode: Silver
•
Membrane: FEP Teflon
•
Electrolyte: YSI standard probe solution (Half
saturated KCl)
•
Polarizing voltage: -0.8 V vs. the potential of the Ag
anode/reference electrode
S YSTEM S PECIFICATIONS
•
Temperature range: -5° to 45° C
•
Temperature accuracy: ±0.2° C
•
Temperature response time: 30 sec for 95% of change.