GroLine pH 4.01 Calibration Buffer (120mL x 5nos) silicone rubber standard check valve with purple

standard check valve with purple pin opens at 28 PSI and closes at 13 PSI

Designed for A2L refrigerant leak detection

50 pack of 6″ x 9

Supports balanced plant nutrition programs

HCS-2 and HCS-3 controllers

GroLine pH 4.01 Calibration Buffer (120mL x 5nos) silicone rubber standard check valve with purpleONLY AVAILABLE WITH MINIMUM QUANTITYThe product comes with minimum quantity of 5 units. HI7004 012 is a high quality pH 4. 01 calibration buffer that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers have the lot number and expiration date clearly marked on the label and are air tight with a tamper proof seal to ensure the quality of the solution. Hanna's line of technical calibration buffers have been specially