Apogee Instruments SI-121-SS Owner's Manual - Page 10
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CABLE CONNECTORS
Apogee started offering in-line cable connectors on
some bare-lead sensors in March 2018 to simplify the
process of removing sensors from weather stations for
calibration (the entire cable does not have to be
removed from the station and shipped with the sensor).
The ruggedized M8 connectors are rated IP68, made of
corrosion-resistant marine-grade stainless-steel, and
designed for extended use in harsh environmental
Inline cable connectors are installed 30 cm from the
conditions.
head
(pyranometer pictured)
Instructions
Pins and Wiring Colors: All Apogee connectors have six
pins, but not all pins are used for every sensor. There
may also be unused wire colors inside the cable. To
simplify datalogger connection, we remove the unused
pigtail lead colors at the datalogger end of the cable.
If a replacement cable is required, please contact
Apogee directly to ensure ordering the proper pigtail
configuration.
A reference notch inside the connector ensures
Alignment: When reconnecting a sensor, arrows on the
proper alignment before tightening.
connector jacket and an aligning notch ensure proper
orientation.
Disconnection for extended periods: When
disconnecting the sensor for an extended period of time
from a station, protect the remaining half of the
When sending sensors in for calibration, only send the
connector still on the station from water and dirt with
short end of the cable and half the connector.
electrical tape or other method.
Tightening: Connectors are designed to be firmly
finger-tightened only. There is an O-ring inside the
connector that can be overly compressed if a wrench is
used. Pay attention to thread alignment to avoid cross-
Finger-tighten firmly
threading. When fully tightened, 1-2 threads may still
be visible.