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P/N item-1114, Glutaraldemeter
The user friendly Glutaraldemeter
3 from PPM Technology Ltd. gives a rapid indication of whether the glutaraldehyde level is above or below the Maximum Exposure Level.
Uses the well proven Lion electrochemical fuel cell sensor
Has improved selectivity
Stores time to peak readings
Holds peak reading
Stores last ten values
3 incorporates the latest technology in its design. Although it uses the same fuel cell and sampling system as its predecessor it has several advantages over it, in that it is much more user friendly. The instrument displays zero when the fuel cell is clear and ready to sample, also holds the peak reading, and memorises the last ten peak values which are then easily accessible. The time to peak i.e. the time taken to reach peak reading is usually characteristic of the vapour being analysed. When alcohols such as ethanol, propanol or butanol are present the time to peak is considerably shorter than the time to peak for glutaraldehyde. This enables the instrument to be more selective.
Glutaraldehyde based solutions are the most commonly used chemical disinfectants in various specialist areas:
Paper and leather manufacture
In a typical hospital application, readings can be taken above and around disinfectant machines, trolley units and in locations such as endoscopy suites, X-ray departments and theatre areas. It can be used to monitor glutaraldehyde when mixing and disposing glutaraldehyde solutions.
Electrochemical Fuel Cell
Glutaraldehyde-Absorbent Standard (Sealed Unit)
3 Digit LCD
Dependent on previous reading (0 - 5 minutes)
0.03 - 4 ppm
10% at 0.20 ppm
Approximately 60 seconds from sampling glutaraldehyde
300 field tests approx. PP3 9v alkaline battery
Instrument: 270 g
Complete Kit: 750 g
Instrument: 150 x 80 x 34 mm
Carrying Case: 266 x 230 x 50 mm
Instrument including Battery
1 Calibration Standard
Calibration Standard Phenol Filters
Principle of Operation
The glutaraldehyde vapour when drawn across the fuel cell sensor undergoes catalytic oxidation on the platinum surface. This produces an electrical output directly proportional to the glutaraldehyde level in the atmosphere.
HOW TO USE
1. Hold the instrument in the atmosphere to be tested and switch on.
2. Press the sample button
3. The glutaraldehyde level is displayed in approximately 60 seconds.
Complete removal of any phenol contaminant is possible with the use of phenol filters.
A high degree of selectivity has been incorporated into the fuel cell sensor. However some substances such as ethanol, propanol and butanol can interfere. By comparing the time to peak with that of the standard it is possible to determine if interfering substances are present and whether more sophisticated analysis is required.
The Glutaraldemeter will normally hold calibration for several months. The instrument can however be checked and calibrated in the field, using the PPM Glutaraldehyde standard. The standard consists of glutaraldehyde solution impregnated on a special absorbent material. A headspace sample from this tube can be used to calibrate the instrument.
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Glutaraldemeter Performance Chart
P.O. Box 979
Ann Arbor, MI 48106-0979
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