The Sable field version FlowKit is a integrated low-noise pump and mass flow generator housed in a portable, virtually indestructible carry case. It’s designed to accurately and quietly deliver large flow rates for applications such as large animal respirometry, or air circulation in small, controlled environments. Available in 3 different models – the FK-100-1, FK-500-1 and FK-2K-1 – for flow ranges of 5-100, 50-500, or 400-2000 liters per minute. The FlowKit relies on modulating a powerful but quiet pump in order to create the set mass flow rate. Ultra-efficient PID (proportional integral derivative) control is used for quick response to setpoint changes and minimal variation from the setpoint. As a result, the pump works only as hard as it has to, greatly reducing pump wear, power consumption and noise. A sub-sampling pump simplifies plumbing to a respirometry system, and features both analog and serial outputs for easy connection to a data acquisition system. The FlowKit requires no temperature or barometric pressure correction because it generates mass or molar flow rates already corrected to STP. It also features a user-configurable alarm to alert users locally and remotely if a fault develops. The FlowKit is powered from 24 VDC (universal adapter supplied) and can be operated from an optional battery pack for field use.
The PP-2 dual pump system provides two reliable, variable-speed diaphragm pumps that operate on 12 VDC (adapter included). The PP-2 provides flow rates of 0-2 L/min, while the model PP-2-1 provides flow rates of 0-5 L/min. These pump systems are ideal for generating flows for respirometry and gas sampling applications. The PP-2 is quiet, operates on an uncritical source of 10 - 16 VDC (power supply included), and has two independent pumps. For most applications requiring mass flow control of up to 1 liter/minute or needle-valve-controlled flow rates up to 3 liters/minute, our PP-2 pump unit replaces conventional pumps and surpasses them in convenience and performance. Because the PP-2 pump unit includes dual variable pump drive controls that allow you to set each pump to the exact drive your application requires, wear and tear on the pumps' diaphragms is minimized. Unlike conventional pumps, the PP-2 completely isolates the pumped gas stream from ambient air. This means that you can confidently supply carbon-dioxide-scrubbed air with the PP-2, and not experience unwanted ppm-level background noise in your reference air stream. Each of the PP-2's internal pumps may be used independently. At low force, each pump can push or pull at least 500 ml/minute through a mass flow controller valve, or through several channels of a flow-control manifold. At high force, the capacity increases up to three-fold. The two pumps can also be run in parallel to increase the total available pumping force by two-fold again. The PP-2 is especially convenient for respirometry systems intended for small mammals (rat-sized and down), arthropods, amphibians or reptiles, where relatively low flow rates are the norm. A high flow version (8 liters/minute per pump) is available by special order only; contact us for information.
The DG-4 relative humidity and dewpoint controller allows versatile control of water vapor content of an air stream. It can be operated in either a locally-controlled mode, or a computer-controlled mode that allows the generation of complex water vapor ramps and steps. In relative humidity controller mode, the DG-4 reads the temperature of the area in which relative humidity control is required, via supplied thermistor probe. Using a saturated air stream as its input (saturator supplied with unit), the DG-4 then adjusts the water vapor content of the air stream to yield the precise set relative humidity. It does so by calculating the saturated water vapor pressure at the regulated air, using the measured temperature at that point. Then, it calculates the target water vapor pressure corresponding to the desired relative humidity entered by the user. Finally, it calculates the dew point corresponding to the target water vapor pressure and regulates its internal condensing unit at that temperature, using a solid-state heat pump. The result is accurate, consistent relative humidity control even in the face of fluctuating environmental temperatures. This is a unique capability of the DG-4 that is invaluable for biological experimentation, product testing, protein crystallography, and other demanding applications Alternatively, the DG-4 can be used as a dewpoint regulator (range 1 - 45 C) or as a water vapor partial pressure regulator. Air flow rates ranging from about 25 mL/minute to 5 liters/minute can be used without affecting the system's regulation efficiency. Condensed water is evacuated from the condenser by a miniature diaphragm pump at user-settable intervals. Alternatively, a simple plumbing change allows the user to remove condensate slowly and continuously with a user-supplied peristaltic pump. Operation is intuitive and flexible, allowing easy operation by a wide range of users. All adjustments and settings are permanently retained in the event of power outage. Analog and serial data outputs are standard.
Depending on the method used, Sable Drosophila metabolic screening systems are capable of measuring the metabolic rates of small groups of Drosophila, or even of individual Drosophila in real time. This unique capability provides a powerful tool for biomedical and basic research requiring metabolic data. Real-time metabolic data on individual flies preserves vital information on inter-individual variability, increasing the power of statistical tests. Drosophila systems are custom-configured according to your requirements, with typical systems measuring from 7 to 15 flies in rapid succession. This can be increased according to your requirements. Metabolic rate is measured via CO2 production rate, which is a highly sensitive and widely accepted method. When monitoring respiratory quotients (RQ) is of interest, the FC-2 differential oxygen analyzer would be added to the system.
The SS-4-Sampler unites a pump, needle valve and linearized mass flow meter into a tough, compact instrument. Its individual gas ports can be used alone or in any combination, making it a versatile solution for sampling or sub-sampling in almost any gas analysis application. The SS-4 is designed for pushing or pulling a gas stream through one or more gas analyzers. Usually this sample gas stream is sub-sampled from a source with a higher flow rate. The linearized mass flow meter covers the range from 0 to 2000 ml/minute, with flow rate displayed on the two-line alphanumeric display. The high quality diaphragm pump provides quiet operation adjustable over a wide range using PWM (Pulse Width Modulation) – minimizing power consumption and diaphragm wear, and lengthening pump motor life. Five analog output ranges are selectable from easily accessed menus on the device or via RS-232 commands. And due to Sable Systems' open serial protocol, the SS-4 is easily integrated into any data acquisition setup whether digital or analog.
The ND-2 Gas Sample Dryer dries saturated air at 25oC to a dewpoint of -10oC, corresponding to a water vapor pressure of 0.26 kPa. It is ideal for subsampling and drying gases prior to analysis. The ND-2 is also available without a pump (model ND-2V) for use with an existing pump or vacuum source. Most forms of gas analysis require the scrubbing of water vapor from the airstream, because the water vapor dilutes the measured gases. Scrubbing water vapor usually requires chemicals that require frequent replacement. In addition, scrubber chemicals can interact with analyzed gas species, such as CO2. The ND-2 is an economical and efficient alternative to scrubber chemicals in the medium to long term, and does not interact with anything but water vapor. The ND-2 can dry air saturated with water vapor at 25C to a dewpoint of -10C, corresponding to a water vapor pressure of 0.26 kPa, which is negligible in most applications. Even if completely dry air is required, using the ND-2 as a pre-scrubber will greatly reduce the amount of scrubber chemicals consumed. The ND-2 uses a strongly polar polymer film that is impermeable to oxygen, nitrogen and carbon dioxide. By creating a strong negative pressure on one side of the membrane, and by using countercurrent exchange principles, the ND-2 gas dryer selectively removes water vapor from the sample stream with very high efficiency - without using expendable chemicals, without interacting with other gases, and without adding significant volume to a gas analysis system.
Sable Systems Classic Line solution for large animal respirometry provides to both researcher and animal the advantage of high-volume flow rates, variable flow options and quiet flow equipment. Automated multiplexing routes the sample gas stream from a room, head-box or mask to the analysis path. Relative humidity is monitored in both incurrent and ex-current air streams, allowing mathematical compensation for water vapor dilution. This eliminates scrubbing of CO2 and H20 from the analyzer stream – a significant advantage with large chamber volumes.
The CA-10 Carbon Dioxide Analyzer measures CO2 in a range of applications from respirometry to industrial gas monitoring. It features a dual-wavelength infrared sensor that provides stable, fast response in a broad CO2 measurement range. Operation is intuitive and flexible, allowing easy operation by a wide range of users. High resolution of 1 ppm at atmospheric levels assures you of trustworthy results. Barometric pressure compensation is standard. Direct modulation of the infrared source translates to greater ruggedness and reliability versus chopper-based CO2 analyzers. The optical bench is differential (dual-wavelength), reducing drift and virtually eliminating sensitivity to water vapor. The design of our optical bench is proprietary, using a low volume, gold-over-nickel-plated optical path and the highest quality machining – with premium emitter, differential detector and optical filtration components. Depending on your application, the CA-10 can be supplied in two different optical bench lengths, optimized for 0-5% or 0-10% CO2. We will recommend the appropriate model for your application at time of order (0 – 5% is typical). The CA-10 CO2 analyzer is easily interfaced to any data acquisition system or data-logger. Eleven ranges of voltage proportional to carbon dioxide concentration or partial pressure, plus multi-range outputs proportional to barometric pressure and optical path temperature, are easily accessed at the rear panel using high-quality BNC connectors. Serial output provides further versatility.