The EPA’s approvals follow thorough reviews of the company’s alternative measurement protocol (AMP) submissions. Endress+Hauser’s Proline Promass Coriolis flowmeters and Proline Prosonic Flow ultrasonic flowmeters have been recognized for meeting the stringent accuracy and precision requirements specified by the EPA. These approvals allow biogas and RNG producers to use Endress+Hauser flowmeters under 40 CFR 80.155(a)(3), provided they meet all other applicable regulatory requirements.