SPECTRA LAB INSTRUMENTS PVT.LTD.

PERSONAL & WORK ENVIRONMENTAL SAMPLERS

Chemical substances used, handled or emanating as By-products in various processes in industry disperse in the work atmosphere as Gases, Vapours and Aerosols. The absorption of the chemicals, above a certain does range, may lead to the causation of various adverse effects on the health of these persons. It is essential to evaluate the levels of pollutants in the work environment to find out whether the levels are within the permissible limits.

HANDY SAMPLER
Model HDS -8

For easy & convenient handling the Handy Sampler is constructed with all the required items mounted in a compact case. It is fitted with Pump, Rotameter with Flow Controller, timer and Sampling Devices. It operates on Rechargeable Sealed Maintenance free Lead Acid Battery. The Battery Charger is built in. Model HDS-8 is Stainless Steel construction & non indicating timer which can be selected in steps of 1,4 & 8 hrs.

S A M P L I N G D E V I C E S


FILTER PAPER HOLDER For monitoring of Dust, Fliter Paper Holders are used. They are available in Acrylic Body and in Two Sizes 47mm Dia and 25mm Dia.	IMPINGERS For analysis of Inorganic Gases such as SO2, Nox etc. the air is passed through absorbing solution filled in the impingers and then appropriate analytical technique is used.	ACTIVATED CHARCOAL TUBES For analysis of Hydrocarbons & Solvent Vapours these Tubes are used. The Charcoal is then desorbed with CS2 and then analysed on GC.

Applications

Analytical Methods

Identification of Pollutants present in the environment. The assessment of Personal Exposures. The determination of the General background levels. To check efficiency and effectiveness of Control Measures.
To find out TWA and STEL values of Airborne
Chemicals. Monitoring of respirable Dust.
Monitoring of Radioactive Dust. Analysis of Ammonia, H2S, Sulphuric Acid Mist, Free Chlorine etc. using Impingers.

The chosen analytical methods will be
dependent on the type of the pollutant. If it is dust
collected on a filtering medium the Gravimetric
Method could be adopted. If the particulate contain metals or their compounds, Atomic Absroption Spectrophotometry could be used. In the case of Gases and Vapours, Titrimetric Method or Spectrophotometric Method is used. Organic pollutants are collected on Absorbing materials (Activated Charcoal, Silica Gel) then desorbed and analysed Chromatographically using Flame-ionisation or Photoionisation Detectors.

RESPIRABLE DUST SAMPLER

Measurement of the concentration of the pollutants in the work environment can be made by monitoring in the Employee's Respiratory Zone, or better still, by fixing Portable Sampling Unit to the employee's clothing. This is called Personal Sampling. We offer following models for Personal Sampling :
Model PMP-3B, Model RDS-3 & Model LFP-2.
For enabling valid integrated samples to be taken of the air actually inhaled by the employee, under normal working conditions, the Personal Sampler is very useful, and is recommended by the National Institute of Occupational Safety and Health, and Occupational Safety and Health Administration, U.S.A.

RESPIRABLE DUST SAMPLER Model RDS - 3

In work environment it is important to measure the concentration of dust. However it is not sufficient to know how much is the suspended particulate matter, but what is the respirable component of it is also required to be known. This is actually the dust, which will go to the lungs and will cause ill effect on the human health. From research it is found that dust particles of size more than 10 micron are unable to reach the lungs. The dust concentration in the size of particles between 0.4 to 10 micron is required to be measured.

The equipment essentially consists of :-
* A pump with flow rate of 1.6 LPM
* Sampling Head

The Pump : It is lightweight with rechargeable batteries lasting for 8 hours when charged fully. The flow rate adjustment is available to adjust at 1.6 LPM. The rotameter is optional, but it should be available to adjust the flow rate. Once adjusted, the rotameter can be disconnected.

The sampling head consist of : Filter paper holder & Cyclone. The filter paper holder is of 47 mm dia in which 0.4 micron filter paper can be kept.

The cyclone construction is such that when the air enters, due to the centrifugal force, particles heavier than 10 micron size are thrown to bottom.

The cyclone & filter paper holder are connected together such a way that air enters the cyclone, heavy particles are thrown below and air with lighter dust particles travels through the filter paper. Particles between 0.4 micron & 10 micron are collected on the filter paper. The filter paper is weighed before and after the sampling. Keeping flow rate of 1.6 LPM, sampling is done for 8 hrs.

The concentration of respirable dust is reported in micrograms / cubic meter.

Specifications :

Model No.	HDS-8	PMP-3B	RDS-3	LFP-2
Voltage	6V dc	4.8 V	4.8 V	4.8 V
Battery	SMF Lead Acid, 4 AH	Ni-Cd(4x1.2V), 1500 MAH	Ni-Cd(4x1.2V), 1500 MAH	Ni-Cd(4x1.2V), 1500 MAH
Rotameter	0 - 5 LPM	optional	optional	optional
Timer	8 hrs. adjustable in step of 1,4 & 8 hrs.	-	-	-
Pulse Mode Operation	Normal, 50% & 25%	-	-	-
Flow Rate	5 LPM Max.	3 LPM Max.	1.6 LPM Max.	0.5 LPM Max.
Flow Adjustment	Needle Valve	Needle Valve	Needle Valve	Needle Valve
Mat. Of Construction	Stainless Steel	Light Aluminium	Light Aluminium	Light Aluminium
Dimension	240x110x150 mm.	115x100x55 mm.	115x100x55 mm.	115x100x55 mm.
Weight	3.1 Kg.	0.8 Kg.	0.8 Kg.	0.8 Kg.

* Due to continuous R & D the specification & Dimensions are subject to Modifications

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