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 | |
| 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 |
Accessories
Densitometer – Optional accessories
Part No | Description |
| DEN MCF STDS | Set of liquid McFarland standards in 16mm ø glass tubes. 0.5/1.0/2.0/3.0/4.0 can be decanted into an alternative tube (shelf-life no longer valid). Requires D16 adaptor, supplies with DEN-1/DEN-1B |
| D16 | Spare tube adaptor for tubes with 16mm outer diameter |
