HONEYCOMB FILTER
FIG5 is a schematic diagram of a pressure loss measuring device 
The pressure loss of the honeycomb filters of Example 1 and Comparative Examples 1 and 2 were measured with a pressure loss measurement device 20 shown in FIG5. FIG5 is a schematic cross-sectional view illustrating the pressure loss measurement process. First, the honeycomb filter 10 was placed inside a metal pipe 21 in an airtight state. The metal pipe 21 was connected to a metal pipe 23 attached to a blower 22. Then, the blower 22 forced air at a velocity of 10 m/s through the honeycomb filter 10 to measure the difference in pressure (pressure loss) between the front and the rear of the honeycomb filter 10 with a pressure gauge 24.
schematic diagram
24
pressure gauge
22
blower
2
Patent Document Comparative Examples
20
pressure loss measurement device
10
honeycomb filter
23
metal pipe
13
wall portion
['1. A honeycomb filter for collecting fine particles, the honeycomb filter comprising: a wall portion formed from a base material containing ceria-zirconia composite oxide and an inorganic binder, wherein in a pore diameter distribution in which a pore diameter and a log differential pore volume measured through mercury porosimetry are respectively represented by a horizontal axis and a vertical axis, the wall portion has a peak in a range in which the pore diameter is greater than or equal to 0.01 µm and less than 1 µm and a peak in a range in which the pore diameter is greater than or equal to 1 µm and less than or equal to 50 µm.']