Grant Bio DEN-1 & DEN-1B Densitometers
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Grant Bio DEN-1 and DEN-1B Densitometers are laboratory instruments designed for the accurate measurement of cell density or optical density (OD) in microbiology, cell culture, and molecular biology applications. These densitometers are used to monitor bacterial growth, assess the concentration of microbial cultures, or determine the turbidity of solutions, providing important data for experimental protocols.
The Grant bio DEN-1 and DEN-1B are a compact benchtop densitometers (suspension turbidity meter) for measuring turbidity of cell suspensions in a variety of life science applications.
The densitometers are designed and factory calibrated to measure turbidity in the range of 0.5 to 4.0 McFarland units (DEN-1) 0.0 to >7.5 McFarland units (DEN-1B) with a small standard deviation. If required, it can deliver a wider measurement range (up to 15.00 McFarland units), but with a greater standard deviation.
- Measurement range: 0.5 to 4.0 McFarland units (DEN-1), 0.0 to >7.5 McFarland units (DEN-1B)
- Measurement time : 1 second
- Precision: ±3%
- Readings, conveniently shown in McFarland units, are clearly visible on the bright LED display
- Factory calibrated – retains calibration without power supply
- Can be user calibrated with commercial standards or cell suspensions prepared in the laboratory
- Designed for tubes with an outer diameter of 18mm. 16 mm tubes can also be accommodated by using the optional tube adaptor D-16
- Extremely compact design with small footprint and low profile – fits easily into the smallest workspace
- DEN-1b – either battery powered by 3 x AAA or via external power supply
Applications
Life science – typical applications include determining concentration of cells (bacterial and yeast cells) in the fermentation process, detecting the susceptibility of micro-organisms to antibiotics, identifying micro-organisms with various test systems, and measuring optical density at fixed wavelength.
Specifications
Den-1 |
Den-1B |
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| Dimensions (h x d x w) | 75 x 115 x 165mm | 75 x 115 x 165mm |
| Temperature range | +4 to 40ºC | +4 to 40ºC |
| Light source | LED | LED |
| Wavelength | 565 ±15nm | 565 ±15nm |
| Range (McFarland units) | 0.3 to 15.0 | 0.00 to 15.00 |
| Precision | ±3% | ±3% |
| Measurement time | 1sec | 1sec |
| Tube diameter – external diameter | 18mm | 18mm |
| Tube diameter – with D16 adapter | 16mm | 16mm |
| Sample volume | >2ml | >2ml |
| Display/display resolution | LED/0.1 McF | LED/0.1 McF |
| Independent power supply | – | 3 x AA batteries |
| External Power supply | Input AC 120-230V, 50/60Hz Output DC 12V | Input AC 120-230V, 50/60Hz Output DC 12V |
| Power consumption – 230V | 1W (0.08A) | 0.1W (0.007A) |
| Power consumption – 120V | ||
| Weight | 0.7kg | 0.7kg |
