Calibration Gas for BW Technologies Multigas Monitors
Size: 34 Liter, 58 Liter or 116 Liter (select when ordering)
Concentration: 25 ppm H2S, 50% LEL, 18% Oxygen, 100 ppm CO
Shelf Life: 24 Months
These are the Special “PortaGreen” Refillable Cylinders. It even includes a return shipping label.
PortaGreen provides a hassle free cylinder return program designed to reduce HAZMAT costs and your carbon footprint.
- Eliminates HAZMAT Liability
- No Disposal or Return Fees
- Reduced Cylinder Footprint
- Increased Shelf Life
- Easy To Return
- All blends available
Here is a link to learn more. http://www.portagas.com/products/portagreen/