Formaldehyde
Formaldehyde
CH2O
Applications
- Paper and wood industry
- Textile
- Productions of resins and adhesives
- Chemical industry
Description
Colorimetric analyzer for the determination of formaldehyde
Method
An excess of MTBH (3-methyl-2-benzothiazoline hydrazone) is added to the sample. The reaction between the compound and formaldehyde leads to the formation of an azine. The subsequent addition of the developing solution oxidizes the excess MTBH, the resulting compound reacts with the azine to form a coniugate system which absorb in the red region of the spectrum. The absorbance is proportional to the formaldehyde concentration and it is measured at 660 nm.
Features
| Measured parameter | CH2O | ||
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Range
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| Wavelength | 660 nm | ||||
| Demineralized water | Not required | ||||
| Number of reagents | 2 | ||||
| Min. analysis time | 18 minutes | ||||
| Default analysis time | 30 minutes | ||||
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Reagent consumption**
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Reagents and standards
Technical Specifications
| Model | 3S-CL |
| Sampling Mode | Batch, with freely settable frequency. |
| Sample | Pressure: Atmospheric Temperature: 5 ‐ 45°C (41 ‐ 113°F) Flow Rate: 80 to 500 mL/min Connection: 6 mm (¼-in.) |
| Drain |
Pressure-free drain Connection: 12 mm (½-in.) |
| Input Streams | 2 |
| Material | Epoxy-coated stainless steel AISI 304 |
| Dimensions (H x W x D) | 604 x 380 x 210 mm (23.6 x 14.8 x 8.2 in) |
| Weight | 20 kg (44 lbs) |
| Power Supply |
Input Voltage: 115 VAC,230 VAC,24 VDC Power consumption: max. 80 W |
| Output signals |
2 x 4-20 mA analog outputs Modbus via RS485,Ethernet |
| Alarms | 2 SPDT programmable voltage-free relays |
| Digital Input | None, Online, Start Extra, Skip Idle, Emergency Stop |
| Ambient Temperature | 5 - 45 °C (41 - 113 °F) |
| Ambient Humidity | 10 - 90 % RH (non-condensing) |
| Protection Grade | IP54 (indoor only, outdoor use possible with external cabinet, not included) |