Features:

• High accuracy. Calibrators in Mesa’s Defender^TM Series are backed by Proven DryCal^® technology and have a reading uncertainty of less than 1%. 
• Durability. All DryCal calibrators are field-proven and have provided IH professionals with reliable performance for decades. 
• Real-time flow data. Calibrator flow data is captured in real-time with our DryCal Pro software, directly uploaded to a PC, and exported to a Microsoft environment. 
• Convenient mail-in factory calibration. An annual NIST-traceable calibration by Mesa’s ISO-accredited facility provides a defensible audit trail and full refurbishment. 
• Trusted accreditation. Mesa Labs is a fully accredited ISO-17025 facility with a 0.08% Scope of Accreditation for gas flow by NVLAP of NIST. "NVLAP Lab Code 200661-0"