New Jersey Administrative Code
Title 7 - ENVIRONMENTAL PROTECTION
Chapter 27B - SAMPLING AND ANALYTICAL PROCEDURES
Subchapter 4 - AIR TEST METHOD 4: TESTING PROCEDURES FOR DIESEL-POWERED MOTOR VEHICLES
Section 7:27B-4.6 - Specifications for diesel emissions testing equipment for determining compliance with N.J.A.C. 7:27-14

(a) A smokemeter used to measure smoke opacity in the exhaust emissions of a diesel-powered motor vehicle in order to determine the vehicle's compliance with N.J.A.C. 7:27-14 shall conform to all specifications and standards set forth in SAE J1667.

(b) Equipment used for performing the OBD inspection at N.J.A.C. 7:27B-4.8 shall be approved by the Department as provided at N.J.A.C. 7:27B-4.2(d) and shall meet the requirements of 40 CFR 85.2231, incorporated herein by reference and SAE J1939.