2"
Datasheet: https://www.hamamatsu.com/resources/pdf/etd/R9800_TPMH1298E.pdf
Hamamatsu R9800-100
SKU: R9800-100-10
Serial Number Physical Location ZT1259 In box in lab ZT1258 In box in lab ZS5636 In box in lab ZS5647 In box in lab ZT1248 In box in lab ZT1245 In box in lab FB2923 In box in lab FB3380 In box in lab FB4468 In box in lab FB5224 In box in lab FB5865 In box in lab FB6416 In box in lab DD2240 In box in lab