NextGen Low Flow Air Sampler LFAS 4
With digital flow meter, volume totalizer and a special sampling pump
Low Flow Air Sampler is an easy-to-carry around sampler for determining the concentration of toxins in ambient and workplace environments.
Latest addition to the well know family of Low Flow Air Samplers. Specially suited for very low flow applications.
Available Model : PEM – LFAS4
Our Low Flow Air Samplers LFAS2 and LFAS3 have been quite popular in the industry for determination of volatile organic compounds (VOCs) and toxic pollutants. They have owed their popularity to their simple design, compact and lightweight construction among other features.
LFAS2 and LFAS3 have been utilizing traditional yet time honoured method of flow measurement, indication and control techniques. Rotameters have been used for flow measurement and indication and needle valves are the flow control devices. These rotameters encounter problems in field since the rotameter float does not move freely and therefore it gives faulty flow reading. This happens either due to dust particles in the glass tube of rotameter or due to uneven surface at the sampling location. These errors are totally eliminated in our new design.
In tune with our philosophy of utilizing state of art techniques, we now offer a ‘Next Generation’ Low Flow Air Sampler with enhanced features
- A special sampling pump suited specifically for low to very low flow requirements
- Digital flow metering
- Volume totalization
- Digital Timer
Applications :
- Compliance Monitoring in industrial areas
- Investigative Air Monitoring for pollution surges
- Workplace monitoring for exposure compliance
- VOC Monitoring
- Fugitive gas monitoring
- Sick Building Investigations
- Factory Act Compliance
- Data Collection and Reporting
- Hospitals
- Elderly care facilities
- Laboratories
Physical Design Highlights :
The sampler comprises a sampling train, a suction pump, a digital flow measuring device, a flow controller and an Electronic assembly. The sampling train accommodates the adsorbent tube. Pollutant-specific adsorbent is packed into the adsorbent tube for entrapping the pollutant of interest. The sampler is made of light weight powder coated aluminum and houses all the components and subassemblies.
The sampling pump is a special pump which affords very low flow. The flow measuring device is a specially designed electronic flow measuring device which is suitable for accurately measuring the desired low to very low flow.
It utilizes a single flow measuring device and a single flow control device.
Salient Features :
- Adsorption tube sampling methodology for a wide range of Organic compounds
- Portable, Compact and light weight
- Microprocessor Based Electronics Timer Cum Time Totalizer for operation in cyclic
- Digital Flow meter and Volume Totalizer
- Rechargeable Li-ion Battery with fuel gauge
- Suitable for Shop Floor or Ambient Air Quality Monitoring
General Specification :
Sampling System
| Sampling methodology | Adsorption tube sampling |
| Adsorption Tube Size ( Diameter) | 6 mm |
| Adsorption media | Activated Charcoal, Tenax GC |
| Number of Adsorption tubes | One (1) |
| Number of Adsorption tubes | One (1) |
| Tube Holder | Suitable for the above mentioned adsorbent tubes |
| Sampling Suction Pump | Diaphragm Type |
| Sample Nozzles | 2 nos. for Sample In & Sample Out |
| Vacuum Generated | > 1500 mm WC |
| Free Flow Generated | > 2 LPM |
Flow measurement and display
| Flow and Volume Measurement | Electronic with digital display on 32 character LCD module. |
| Flow Measurement range | 20-500 cc / minute or user specified |
| Flow Control Device | Fine Needle Valve |
| Flow Measurement Accuracy | ± 3% of full scale |
Electronics
| Time Display | On 32 character LCD module |
| Operating keys | 4 nos. |
| Electronics | Microprocessor based |
| Sampling Mode | Programmable – Continuous or Cyclic |
| Sample Time | Settable from 0 to 999 minutes for automatic stop after the set time |
| Timer accuracy | ± 1 minute over full timer range |
| Run Time with fully charged battery | More than 10 hours |
Construction
| Enclosure | ABS with laminated front panel |
| Sample Nozzles | 2 nos. for Sample In & Sample Out |
| Physical Dimensions | 20. x 12 x 8 Cms |
| Weight | 1kg |
Accuracy Specifications :
| Flow Measurement Accuracy | ± 3% of full scale |
| Time Measurement Accuracy | ± 1 minute over 8 hours. |
Operating Environment :
| Power | 7.2 VDC from Li-ion battery with fuel gauge |
| Battery Charger | Internal |
| Temperature | 5 to 50o C |
| Relative Humidity | Upto 95% non condensing |
Comparison with similar products
| Instrument | Personal Air Sampler | |||
| Model | PEM-LFAS 2 | PEM-LFAS 3 | PEM-PAS 1L | PEM-PAS 4 |
| Sampling Medium | ||||
| Sampling Tube Quantity | ||||
| Housing / Holder | ||||
| Simultaneous Sampling | ||||
| Suction Pump | ||||
| Vacuum | ||||
| Free Flow | ||||
| Flow Meter Range | 50-500 cc/ minute | 20.0-500.0 cc / minute or user specified on digital display | ||
| Flow Control | Fine Needle Valve | Needle valve | ||
| Time Display | Nil | 32 character LCD module. | ||
| Operating keys | Not provided | 4 nos. | ||
| Electronics | Not applicable | Microprocessor based | ||
| Delay Time | Not applicable | Not provided | ||
| Sample Time | Not applicable | Settable from 0 to 999 minutes for automatic stop after the set time | ||
| Cyclic Mode | Not provided | Provided | ||
| Enclosure Cabinet | Poly carbonate with laminated front | ABS with laminated front panel | ||
Accessories and Consumables :
- Activated Charcoal tubes
- Tedlar bags
- Carry Bags
Related Services :
- Flow Calibration
Related Products :
You may also be interested in :
- Low Flow Air Sampler Model PEM-LFAS 2, PEM-LFAS 3
- Portable Gas Sampler Model PEM-PGS1, PEM-PGS2
- Thermo-electric Cooled Gas Sampler Model PEM-TECGS1
- Handy Air Sampler Model PEM-HAS 1
- Personal Air Sampler Model PEM–PAS 1, PAS 1A, PAS1L
