WIKA #52922211 Bimetal thermometer, Process grade according to ASME B40.200 Model: TG53.4Z Specifications according to data sheet: ATM 53.02 Accuracy Class: +/- 1% of Full Scale (ASME B40.3) Nominal size: 4" Connector position: back mount Design of Connection: standard, male thread Process Connection: 1/2" NPT Scale Range: 0 �F ... 250 �F Stem Diameter: 3/8" Insertion length L1: 2.5" Window: Flat Instrument Glass Ingress Protection: IP 66 / NEMA 4X with Serial number Manufacturer logo: *WIKA�* Inspection certificate 3.1 per EN 10204 Certificate type: Inspection certificate acc. to EN 10204 3.1 Certificate Language: English and German Certificate for: thermometer mechanical Accuracy: Calibration values listed, 3 test points Customs tariff number: 9025198080