34Installation3.9.4 Sensor removal• If not using the ORBISPHERE 32003 insertion/extraction valve (refer to The 32003insertion/extraction valve on page 35) you will need to shut off the sample flow and drain thesampling circuit of liquid.• Remove the sensor cable connected at the sensor end.• Hold the sensor body in one hand to avoid rotation, and unscrew the collar with the otherhand.• Pull the sensor straight out of the socket or flow chamber.• Install sensor storage cap and sensor base (to protect the connection).3.9.5 Weld-on stainless steel socketThe ORBISPHERE 29501 weld-on sensor socket can be used to install a sensor into a stainlesssteel pipe (min.Ø 50 mm or 2”). When welding the socket to the pipe, check that setbackbetween the pipe’s inner diameter and the sensor tip does not exceed 4 mm (see diagram).Note: Be sure to remove the two O-rings from the socket before welding and leave the sensor’s stainlesssteel cap screwed on during welding to prevent thread distortion.Recommendation:To facilitate sensor removal and installation, we suggest installing the socket in a location wherethe liquid can be drained quickly and easily. By creating a one meter long piece of pipe (seeFigure 23) with shut off valves at both ends, just a small volume of liquid needs to be drained toenable sensor removal.Also, a precise sensor and socket installation can be performed in the workshop, and thisassembly can be placed in the production line with minimal down time.Figure 22 Weld-on sensor socketFigure 23 Installation in-line
