A holster assembly, and method using same, are disclosed. The laser light at the laser carrier frequency and other modulation sidebands bypass the optical resonator filter to reach a fast photodetector. The buffer may be coupled to a data stream and configured to store at least part of the data stream, and the match event table may be configured to store data indicative of a buffer location corresponding with a start of a search criterion being satisfied. During typical use, a user removes the drain plug with the glove and drains the oil while the glove and inflatable structure protects the user from the hot motor oil. A bypass line is provided which is branched from the water treatment line upstream of the electrolyzing chamber for sampling the water, introducing the sampled water into the sensor for the measurement of the residual chlorine concentration thereof, and discharging the sampled water into the electrolyzing chamber after the measurement.