GASTEC GSP-501FT Automatic Air Sampling Pump
The GASTEC GSP-501FT is a compact, lightweight, and reliable automatic air sampling pump designed for use with GASTEC detector tubes and sorbent tubes. It offers quiet operation with low noise and features a large screen that simultaneously displays suction flow rate, sampling time, and integrated volume.
Visual Description: The document displays the GSP-501FT pump in various contexts. One image shows the pump mounted on a tripod. Another provides a close-up of the pump's front panel, highlighting its LCD display and control buttons (POWER, MODE, SELECT, START/STOP). A third image illustrates a person wearing the pump attached to their belt, demonstrating its portability for personal exposure monitoring.
Key Features
- Flow range: 50-500mL/min.
- Volume Mode flow rate: 10-500mL/min. When set between 10-49 mL/min, intermittent operation is performed at 50mL/min.
- Equipped with a fixed flow function that automatically regulates load changes.
- Flow rate, sampling time, and integrated volume are displayed simultaneously on the same screen.
- Automatic start function allows sampling to commence after a preset time.
- Supports saving up to 5 different sampling settings via the program mode.
- Real-time flow volume and integrated flow volume are automatically corrected to standard conditions of 20°C (68°F) or 25°C(77°F).
Display and Indicators: The pump features an easy-to-read, large LCD screen that displays the selected operating mode, flow rate, sampling time, and integrated volume. Two LED lamps blink during sampling operations, providing visible status indication from a distance.
Power: The pump operates using two AA alkaline batteries or two AA nickel-metal hydride batteries.
Specifications
| Parameter | Value |
|---|---|
| Model | GSP-501FT |
| Timer Mode | Air pump automatically stops at set time. Settable time: 1 minute to 30 hours. |
| Volume Mode | Air pump automatically stops at set volume. Settable integrated volume: 0.010 to 900L. |
| Flow Rate Setting | Timer Mode: 50-500mL/min. Volume Mode: 10-500mL/min (Note: When set to 10-49 mL/min, intermittent operation is performed at 50mL/min). |
| Suction Pressure | 10-49mL/min: 0.0-5.0kPa; 50mL/min: 0.0-40.0kPa; 100mL/min: 0.0-37.0kPa; 200mL/min: 0.0-30.0kPa; 300mL/min: 0.0-23.0kPa; 400mL/min: 0.0-16.0kPa; 500mL/min: 0.0-10.0kPa. |
| Display | Liquid crystal digital display (with backlight). Display range: 0-600mL/min. |
| Functions | Constant flow rate function (built-in set flow rate holding circuit), Autostart function (autostart after set standby time), Diaphragm type air pump, Program Mode (5 sampling settings). |
| Accuracy (Instantaneous Flow Rate) | 50-500 mL/min: ±5%. Volume Mode (10-49 mL/min): ±(2.5 × sampling time [min]) mL. |
| Operating Temperature | 0-40℃. |
| Operating Humidity | 10 to 90% RH (non-condensing). |
| Power Source | 2 AA alkaline batteries (standard accessories, commercially available) or 2 AA nickel-metal hydride batteries (commercially available). |
| Battery Life | Approximately 20 hours (with 2 AA alkaline batteries, set flow rate of 200 mL/min, suction pressure of 2kPa or less, ambient temperature of 25°C). |
| Dimensions (W×D×H) | 80(W)×40(D)×126(H) mm. |
| Weight | 280g (including batteries). |
| Standard Accessories | 2 AA alkaline batteries, detector tube adaptor, tube tip holder, dust filter (5pcs), instruction manual, warranty certificate, inspection certificate. |
| Compliance | EU Directive: 2014/30/EU (EMC), 2011/65/EU, (EU)2015/863 (RoHS). UK Regulation: 2016 No. 1091 (EMC), 2012 No.3032 (RoHS). EU Standards: EN 61326-1:2013. UK Standards: BS EN 61326-1:2013. EU Standards: EN IEC63000:2018. UK Standards: BS EN IEC63000:2018. |
Intermittent Operation
When the instantaneous flow rate is set to 10-49 mL/min in Volume Mode, the pump performs intermittent operation by sampling at an instantaneous flow rate of 50mL/min.
Visual Description of Diagram: A diagram illustrates the intermittent operation cycle. It shows a timeline with segments labeled 'sampling' and 'pause'. The cycle consists of 12 seconds of sampling at 50mL/min, followed by a 48-second pause. This pattern repeats until the target volume is achieved.
Example of Intermittent Operation: If Volume Mode is selected and the flow rate is set to 10 mL/min with a target volume of 0.1L, the pump will sample for approximately 12 seconds at 50mL/min, then pause for about 48 seconds. This sampling-pause cycle repeats until the set volume of 0.1 L is collected, taking approximately 10 minutes.
Note: If there is a sudden change in gas concentration or if sampling is performed for a short period, the error in the sampling result may be significant.
Sorbent Tubes
Sorbent tubes are glass tubes filled with sorption agents, such as activated charcoal or silica-gel, used to adsorb toxic gases in various environments. To use them, both ends of the tube are broken off, connected to a sampling pump for sample collection. The adsorbed substance is then extracted using a solvent and analyzed via gas chromatography.
Options and Accessories
- Gas sampling pump tripod stand (GSP-TRIPOD): Allows mounting of the GSP-501FT to use at the desired height.
- Belt loop pump holder (GSP500FT-30): Designed for personal exposure measurement.
- Rubber caps (DTP-2-20): Reusable rubber caps that can be attached to the broken tips of detector tubes as an extra precautionary safety measure. One package contains 20 caps.
- Protective cover for detector tube (GSP300-14): Enables the detector tube to be securely set up for measuring and helps to avoid possible injury to the user as well as damage to the detector tube itself.
- Sampling tube holder (730): A tube holder for personal exposure measurement.
- Tripod mounting plate (PLATE 2): Allows two pumps to be mounted on the same tripod.
Detector Tubes for Automatic Air Sampling Pump
GASTEC offers a variety of detector tubes for automatic air sampling. The table below details some common detector tubes:
| Detector Tube | Chemical Formula | Substance | Concentration Range | Sampling Volume (mL) | Sampling Time (min) | Initial Color | Color Change | Detection Limit | Remarks |
|---|---|---|---|---|---|---|---|---|---|
| Ammonia | NH3 | Ammonia | 25-50 ppm | 100 | 1 | Yellow | Brown | 25 ppm | T: Temp Correction |
| Benzene | C6H6 | Benzene | 10-150 ppm | 100 | 1 | Yellow | Brown | 10 ppm | T: Temp Correction |
| Carbon Monoxide | CO | Carbon Monoxide | 10-300 ppm | 100 | 1 | Yellow | Brown | 10 ppm | T: Temp Correction |
| Carbon Disulfide | CS2 | Carbon Disulfide | 5-100 ppm | 100 | 1 | Yellow | Brown | 5 ppm | T: Temp Correction |
| Chloroform | CHCl3 | Chloroform | 5-100 ppm | 100 | 1 | Yellow | Brown | 5 ppm | T: Temp Correction |
| Ethyl Acrylate | C3H6O2 | Ethyl Acrylate | 10-200 ppm | 100 | 1 | Yellow | Brown | 10 ppm | T: Temp Correction |
| Ethyl Mercaptan | C2H5SH | Ethyl Mercaptan | 10-200 ppm | 100 | 1 | Yellow | Brown | 10 ppm | T: Temp Correction |
| Formaldehyde | CH2O | Formaldehyde | 2-40 ppm | 200 | 2 | Yellow | Pink | 2 ppm | T: Temp Correction |
| Hexane | C6H14 | Hexane | 50-500 ppm | 100 | 1 | Yellow | Brown | 50 ppm | T: Temp Correction |
| Hydrogen Cyanide | HCN | Hydrogen Cyanide | 5-100 ppm | 100 | 1 | Yellow | Brown | 5 ppm | T: Temp Correction |
| Hydrogen Sulfide | H2S | Hydrogen Sulfide | 5-100 ppm | 100 | 1 | Yellow | Brown | 5 ppm | T: Temp Correction |
| Methanol | CH3OH | Methanol | 50-500 ppm | 100 | 1 | Yellow | Brown | 50 ppm | T: Temp Correction |
| Methyl Acrylate | C4H6O2 | Methyl Acrylate | 10-200 ppm | 100 | 1 | Yellow | Brown | 10 ppm | T: Temp Correction |
| Methylene Chloride | CH2Cl2 | Methylene Chloride | 50-500 ppm | 100 | 1 | Yellow | Brown | 50 ppm | T: Temp Correction |
| Toluene | C7H8 | Toluene | 50-500 ppm | 100 | 1 | Yellow | Brown | 50 ppm | T: Temp Correction |
| Vinyl Chloride | C2H3Cl | Vinyl Chloride | 50-500 ppm | 100 | 1 | Yellow | Brown | 50 ppm | T: Temp Correction |
| Xylene | C8H10 | Xylene | 50-500 ppm | 100 | 1 | Yellow | Brown | 50 ppm | T: Temp Correction |
Key for Remarks: T: Temp Correction, H: Humidity Correction, +: Twin Tubes, *: Refrigerated Storage, ※: Correction Factor.
Disclaimer: Specifications and appearance are subject to change without notice. Please read and understand the instruction manuals completely before operating. Actual products may differ slightly from the pictures shown.
Document Version: November, 2022.
