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 1		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 50^oC
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 →
Decision Criterion ↓

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

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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Rudimentary Low Cost PM10 Samplers