Harvard Dry Gas Meter
£2,934.00 inc VAT (£2,445.00 + VAT)
Harvard Dry Gas Meter
Ideal for measuring the volume of expired gases collected in Douglas Bags or the volume of gases drawn through a system
This industrial Meter has been adapted for experimental use. It is a diaphragm-type, positive displacement Meter that is accurate to ±1.5%.
The inlet and outlet tubing connections fit the two most frequently selected hose sizes for gas equipment. Hoses with a nominal bore of 22 mm fit directly onto the first step of the connectors. A tapered fitting accepts the 30 mm airway systems with such equipment as Harvard Apparatus Douglas Bags.
An optically-coupled detector drives a 4-digit LED display in cumulative 0.1 litre increments from 0.1 to 999.9 litres maximum with an electrical zero reset. A 2.5 mm output socket produces a TTL compatible, 5 V pulse with each 0.1 litre increment.
This Meter is portable. It measures, H x W x D, 30 x 20 x 17.5 cm (12 x 8 x 7 in), weighs 4 kg (9 lb) and operates on one 9 V transistor battery (included).
Harvard Dry Gas
Meter Key Features
- The digital display has a readout of 999.9 litres
- A reset button permits the volumes of individual Douglas Bas to be measured, otherwise the volumes can be totalled on the display
- Battery powered operation using the internal LiPo 3.7V ~1100mA rechargeable battery
- Continuous operation using the Micro-USB 5V 500mA power supply
- Charging of the rechargeable battery with the Micro-USB 5V 500mA power supply
- LED indicates charging status
- Parallel charging and measuring operation possible
- Bright display of measurement values, adjustable contrast
- An output socket on the front panel provides a 5V TTL logic pulse
Setting up the system
- Position your Harvard Dry Gas Meter on a solid, even surface
- Plug in the power cord to the input micro-USB connector at the top of your Dry Gas Meter
- Connect the power supply to a wall plug if you want your device to be recharged or for continuous operation
- Connect all tubing according to your experimental setup, like the Douglas bag to the inlet connector on the top of the Dry Gas Meter
- Switch on the Dry Gas Meter
Starting the Experiment
The Harvard Dry Gas Meter is ready to start immediately after switching on the measurement. The volume is automatically set to “0” upon restart.
The display can be reset to “0” for a new experimental run or when a new Douglas bag is used by pressing the RESET button.
Recharging the Dry Gas Meter’s battery
The Dry Gas Meter is equipped with a rechargeable battery. This battery is charged every time the instrument is connected to power using the micro-USB power cable. During the recharging the LED on the front turns blue, and the LED switches off when the recharging process is finished.
The power cable can stay connected all the time, as well during measurements. When charging during measurements the LED may turn on and off from time to time.
In the cases where the rechargeable battery has been fully depleted, it can take up to 5 minutes before the display turns on and you can start measurements
The LiPo rechargeable battery has very little self-discharge and can stay charged for several months.