14-04-2016, 07:22 PM
To all that want an alternative to the Brava smart box:
Amazon sells the Ht1890 Digital Air Pressure Meter and Manometer
Rise HT-1890 Professional Digital Air Pressure Meter & Manometer to Measure Gauge & Differential Pressure ±13.79kPa / ±2 psi / ±55.4 H2O
circa $45, free shipping.
The airlocks and air connectors are bought at noogleberry --comes with the larger tubing, which can slip over the smaller Brava tubing and the tubing that domes with the manometer.
The system holds the pressure steady, so that once initially set at -33mmHg you can expect it to still be in the -25 mmHg range after about 3-4 hours and -20 mmHg after 7 hr (providing you don't break the vacuum seal).
Amazon sells the Ht1890 Digital Air Pressure Meter and Manometer
Rise HT-1890 Professional Digital Air Pressure Meter & Manometer to Measure Gauge & Differential Pressure ±13.79kPa / ±2 psi / ±55.4 H2O
circa $45, free shipping.
The airlocks and air connectors are bought at noogleberry --comes with the larger tubing, which can slip over the smaller Brava tubing and the tubing that domes with the manometer.
The system holds the pressure steady, so that once initially set at -33mmHg you can expect it to still be in the -25 mmHg range after about 3-4 hours and -20 mmHg after 7 hr (providing you don't break the vacuum seal).