Rudimentary Low Cost PM10 Samplers
Available Models : PEM–RDS 1, PEM–RDS 1NL, PEM–RDS 2

Model Comparisons :
The various models differ from each other in the type of blower used and type of the electronic control module employed as shown in table below
Model → Component / Device ↓ |
PEM-RDS 1 | PEM-RDS 1NL | PEM-RDS 2 |
Compatible Blower | BL1 | NL1 | BT1 |
Electronic Control Module Type | ECM 2 |
Electronic Control Modules are similar in all respects except the following
Model → Component / Device ↓ |
ECM 1 | ECM 2 |
Compatible Blower | BL 1 / NL1 | BT1 |
Flow Setting Range | Not Available | 25% to 98% of max flow |
Flow Control Mode | Not Available | Manual – Open Loop |
Flow Control Accuracy | Not Available | 3% of set value |
Specifications and features common to ECM1 and ECM2
LCD Display | 32 Character Alphanumeric LCD Module with blue backlit | ||
Number of Keys | 7 | ||
Real Time Clock (RTC) | Nil | ||
Settable Sampling Start Delay Time | Settable Up to 99 Hrs. 59 Min. | ||
Settable Sampling Time | Settable Up to 99 Hrs. 59 Min. | ||
Electronic Time Totalizer Range (Cumulative Sampling Time) | Up to 99 Hrs. 59 Min. | ||
Automatic Sampling Start / Stop Control |
Fully programmable electronic timer to automatically shut off system after preset time interval. | ||
Additional sampling control facility | Nil | ||
Cyclic Mode Programming | Nil | ||
Flow Measurement Basis | Flow is inferred from differential pressure (Δp) across an exhaust orifice | ||
Δp measurement device | U tube manometer mounted on the inside of the instrument Range: 0-32 cms | ||
Flow inferring technique | From flow Vs Dp graph Calibrated for each orifice and manometer combination | ||
Displayed Flow Range | Not Available | ||
Digital Flow Display | Not Available | ||
Volume Totalizer Range | N/A | ||
Temperature Measurement (for STP correction) | Not available | ||
Internal Memory for data storage | Not available | ||
Parameters Stored in internal memory | Not applicable | ||
Addition information stored in internal memory | Nil | ||
Data Transfer to Pen Drive through USB port | Not available | ||
PC Interface software | |||
Safety Features |
Accuracy Specifications
Model | PEM–RDS 1 | PEM–RDS 1NL | PEM–RDS 2 | |
Flow Measurement Accuracy | ± 3% | ± 3% | ||
Flow Control Accuracy | - | - | ||
Time Measurement | +/- 1 minute over 24 hours |
General Specifications - Common to PEM–RDS 1, PEM–RDS 1NL, PEM–RDS 2
Filter Holder | SS 304 to accommodate filter paper of 25 x 20 cm |
Filter Media | Whatman GF/A or EPM – 2000 |
Particulate Sampling | For PM10 (i.e <10µ ± 1µ) using size selective inlet at 1.13M3/Min For SPM (i.e. <100µ) with Gable Roof (optional) |
Construction Material & Finish | Sturdy Powder Coated Aluminum |
Operating Environment
Power | 230 V AC ± 10%, 50 Hz.( 110 V, 60 Hz Optional ) |
Temperature | 5 to 50oC |
Relative Humidity | Up to 95% non condensing |
Physical Characteristics
Model | PEM–RDS 1 | PEM–RDS 1NL | PEM–RDS 2 |
Size ( all dimensions in mm) |
510 x420 x 1230 | 450 x 380 1100 | 450 x 380 x 850 |
Weight | 42 Kg | 45 Kg | 22 Kg |
Quick Selection Guide
The table here below lists the decision criteria and the relative score / rating of the various models for the same
HVAS Model → |
RDS 1 | RDS 1NL | RDS 2 | RDS 4 | RDS 4NL | RDS 5 | RDS 6 | RDS 6NL | RDS 7 | RDS 8 | RDS 8NL | RDS 9 | |||
Initial Cost | Excellent | Good | Average | ||||||||||||
Running Cost (savings) | Fair | Fair | Good | Fair | Excellent Daily savings of 2 Filter papers ( Rs. 400) |
||||||||||
Maintenance Requirement | Average | Excellent | Poor | Average | Excellent | Fair | Average | Excellent | Fair | Average | Excellent | ||||
Operator Skill Requirement | Poor ( Skilled Operators required) |
Good (Automatic Data Acquisition Skilled Operators Not required) |
Excellent Automatic Data Acquisition and versatile reporting Skilled Operators Not required |
||||||||||||
Portability | Average | Poor | Good | Average | Poor | Good | Average | Poor | Good | Average | Poor | Excellent | |||
Flow Setting | Poor | Fair | Poor | Fair | Poor | Excellent | |||||||||
Flow Control | Poor | ||||||||||||||
Flow Accuracy | Fair | Average | Excellent | ||||||||||||
Flow Constancy | Poor | Good | Excellent | ||||||||||||
Automatic Measurement Data Recording | Poor | Good | Excellent | ||||||||||||
Data Transfer to PC | Absent | Excellent | |||||||||||||
Data Transfer to USB Pen Drive | |||||||||||||||
Versatile Report Generation and Storage | |||||||||||||||
Circular Chart Plotting of Flow Data |
Score : Absent, Poor, Fair, Average, Good, Excellent
Recommendation for Selection of High Volume Air Sampler
S. No. | Scenario | Recommended Model |
1 | Severe Funds Crunch, Skilled Operator(s) available | PEM-RDS 1, PEM-RDS 1NL |
2 | Limited Funds availability, skilled manpower not available | PEM-RDS 5 |
3 | Desire for best value for money | PEM-RDS 9 |
4 | For other situations | Study the quick selection guide and decide. |
5 | Still not able to decide | Contact Polltech |
Competition shortcomings
- Flow– Well type Manometer( calibrated for flow) Vs Digital Display
- No volume totalization
- No flow recording
- Data transfer
- Data recording
- Start / stop
- Cycling
- Power Interruption recording
- STP / operating condition flow
- Flow control accuracy
- inlet
Add-ons
Size Selective Inlet for PM10 Sampling | By replacing Gable Roof with Size Selective Inlet, this instrument can be transformed into a PM10 High Volume Sampler ie for lower size particulate concentrations , sampling of particulates < 10µ |
Standard Ambient Gaseous Sampling Equipment | This basic add-on with icebox cooling allows the HVS to be utilized for sampling of upto four gaseous pollutants in addition to particulates which is the primary function of the equipment. |
Thermoelectric Cooled Ambient Gaseous Sampling Equipment | This advanced add-on with thermo electric cooling allows the HVS to be utilized for sampling of upto four gaseous pollutants in addition to particulates which is the primary function of the equipment. |
Accessories and Consumables
- Voltage Stabilizer
- Filters of various media and sizes
- Chemical Reagent Kits
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