Massflow
The gas flow controller LAMBDA MASSFLOW allows a precise and automatic control of the pH in cell cultures without the need of any other gas station:
Programmable Gas Flow Controller – LAMBDA MASSFLOW
The flow rate is measured by high quality laminar mass flow sensor tubes and is displayed on a digital display. The mass flow cell has a very low-pressure drop (less than 1 cm of H2O) and a linearity error of less than ±3% reading (which is much better than the precision expressed as a percentage of full scale usage by some manufacturers). The repeatability is better than ±0.5% reading. The flow rate is regulated by a specially developed proportional needle valve controlled by a microprocessor.
MASSFLOW can be operated manually with the buttons on the front panel or using the remote control. The analogical remote control includes ON/OFF and 0 to 10 V full-scale control of the flow rate. Digital control can be achieved by the optional RS-485 interface.
Programming:
Up to 50 pairs of flow rates and times can be programmed. This allows the flow to be switched on and off or the setting of any flow rate for a desired time interval.
Gas volume Totaliser:
MASSFLOW generates impulsions after every 5 ml of gas flow. These impulsions can be totalized by LAMBDA INTEGRATOR (Art. No.: 4803), measured as a voltage, recorded on a recorder or on a PC (e.g. fermentation program FNet or SIAM). In this way exact volume information can be obtained.
Zero setting:
MASSFLOW is equipped with an automatic zero setting which further improves the precision of the flow rate reading. This function allows precise calibration when other gases are used.
MINI-4-GAS:
LAMBDA offers MINI-4-GAS, an automatically controlled gas mixing module for MINIFOR bioreactor and fermentor to maintain the optimal physiologic conditions of your mammalian and stem cell cultures using modern control strategies.
TECHNICAL SPECIFICATIONS:
Type: LAMBDA MASSFLOW – microprocessor-controlled gas flow controller (controller only) and gas flow meter
Accuracy: ± 3% reading or 1 digit
Repeatability: ± 0.5 % reading or 1 digit
Flow range:
MASSFLOW 5000: 0 – 5.00 l/min in 0.01 l/min steps (controller)
MASSFLOW 500: 0 – 500 ml/min in 1 ml/min steps (controller)
MASSFLOW 5000-s: 0 – 5.00 l/min in 0.01 l/min steps (meter only)
MASSFLOW 500-s: 0 – 500 ml/min in 1 ml/min steps (meter only)
MASSFLOW 500-hs: Auto-range: 0 – 99.9 ml/min in 0.1 ml/min steps and 100 – 500 ml/min in 1 ml/min steps (meter only)
Calibration: N2/Air (pre-calibrated sensors for other gases available on request)
Non-volatile memory: storage of all settings
Maximum pressure: 0.2 MPa (2 bar)
Power supply: 90–240 V/50–60 Hz AC plug-in power supply with DC 12V/24W output; possible field operation on 12 V accumulator (Plug types: AU, CH, EU, UK, US)
Interface: RS-485 or RS-232 (optional)
Remote control: 0-10 V; (option 0-20 or 4-20 mA); ON/OFF (controller only)
Dimensions: 10.5 (W) × 8 (H) × 17 (D) cm
Weight: 800 g
Safety: CE, meets IEC 1010/1 norm for laboratory instrument
Operation temperature: 0 – 40 ⁰C
Operation humidity: 0-90% RH, not condensing
