Model RP and Econo-Cal Calibration Cylinders
Combination gas cylinders contain 2.5% methane, 300 ppm carbon monoxide, 15% oxygen and 10 ppm hydrogen sulfide in nitrogen. For both the Model RP and the Econo-Cal, contents are at 500 psig. The aluminum cylinders measure 13 3/4" x 3". The Model RP weighs 1 lb. 11 oz. and contains approximately 58 liters at atmospheric pressure. The Econo-Cal weighs 1 lb. 1 oz. and contains approximately 34 liters at atmospheric pressure. Reactive gases have an expiration date listed on each cylinder.
| Part Number | Description | Price |
| MSA 813720 | Model RP (2.5% Methane, 300 ppm CO, 15% O2, 10 ppm H2s) | $299.00 |
| MSA 711076 | Econo-Cal (2.5% Methane, 300 ppm CO, 15% O2, 10 ppm H2s) | $199.99 |
| MSA 711058 | Econo-Cal (1.45% Methane, 300 ppm CO, 15% O2, 10 ppm H2s) | $199.00 |
| MSA 10048280 | Econo-Cal (1.45% Methane, 60 ppm CO, 15% O2, 20 ppm H2s) | $199.00 |