deltacnt.com | Capacitance > Model 173 | 77 Flow Level Temperature MODEL EXAMPLE 173 - - - - - - 7WI AA AA Model Numbering System MODEL DESCRIPTION 173 Capacitance Level Transmitter, Loop Powered, Digital Circuitry MODEL HOUSING RATING MOUNTING LOCATION OPTIONS ¹ HOUSING RATING DESCRIPTION AA None 4XI Environment-proof, 4X, PVC, integral mount 4XR Environment-proof, 4X, PVC, remote mount 7WI Explosion-proof, 7X, aluminum, Classes 1 & 2, Divisions 1 & 2, Groups BCD, EFG, integral mount 7WR Explosion-proof, 7X, aluminum, Classes 1 & 2, Divisions 1 & 2, Groups BCD, EFG, remote mount 7TI Explosion-proof, 7X, 300 Stainless Steel, Classes 1 & 2, Divisions 1 & 2, Groups BCD, EFG, integral mount 7TR Explosion-proof, 7X, 300 Stainless Steel, Classes 1 & 2, Divisions 1 & 2, Groups BCD, EFG, remote mount MOUNTING LOCATION² DESCRIPTION AA None (integral) **P ** feet of interconnecting cable for remote mounting, includes sensor and compensation cable, 160 °F (71 °C), PVC 2 **D ** feet of interconnecting cable for remote mounting, includes sensor and compensation cable, 400 °F (204 °C), FEP 2 OPTIONS1-2 DESCRIPTION AA None PS1 Internal power supply, 120 VAC to 24 VDC PSM Housing mounting bracket for remote mounting; surface or 2 in pipe mounting 2 REQUIRED ORDERING INFORMATION: • Detailed model number • Tag or nameplate detail (if required) • Documentation & testing packages (if required, refer to Additional Resources) Notes: ¹ A hyphen will separate multiple options selected 2 PSM **P, **D only available with remote mount housing
