Thief-type sampler

Fig. 4. Types of sampleis foi obtaining small (1 mg to several g) lepiesentative samples from a bulk supply of powdei (a) thief sampler (b) passive...

This practice covers the procedure for obtaining representative samples of hollow microspheres of the type used for syntactic foam buoyancy materials. Hie procedure consists of procuring representative samples by the use of "spike" or "thief samplers which can be inserted all the way to the bottom of the container, thus sampling the entire vertical distance. 

Physical Sampling Methods. The behaviors of two popular types of thief samplers are shown in Figures 15-4 and 15-5 (Muzzio et al., 1999). In Figure 15-4a we illustrate the bed disturbances that occur when using a side-sampling thief. This device consists of a tube with a slot in its side that can be... 

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