Agricultural measuring device PCE-TUM 20

Order no.: PCE-TUM 20

GTIN (EAN): 4250348708250

Description

Agricultural measuring device according to ISP 7027 /

Two automatic switching measuring ranges between 0 ... 50 NTU and 50 ... 1000 NTU

The Agricultural measuring device is a handy device equipped with a large display, fulfilling all standards for a turbidity analysis on-site. The measuring range of 0 ... 1000 NTU is separated into two automatically switching measuring ranges for purposes of increasing the accuracy of the turbidimeter. With a well-arranged keyboard the turbidimeter is easy to operate. LED's are used as a light source, which work with a wave length of 830 nm in infrared ranges of light, and by that are invisible to the human eye.

Since the measurement is not performed in a visible range, possible pigmentation of the sample plays a minor role during measurement. Due to a formation of the photodiodes in a 180 ° and 90 ° angle, transmitted light measurement is performed for higher ranges whereas diffused light measurement is used for lower ranges. With the reference standards of 0 NTU and 100 NTU included in the delivery, the turbidimeter can be calibrated or adjusted at any time. The turbidimeter PCE-TUM 20 fulfills according to EN 27027 / ISO 7027 all acquired standards.

Units

The Agricultural measuring device displays the measurement results in NTU units (Nephelometric Turbidity Unit). This unit is preserved in the ISO standards. NTU is identical with FTU (Formazine Turbidity Unit). Furthermore there are two more units in practice for turbidity: JTU and SiO2. JTU (Jackson Turbidity Unit) is equal to 19 NTU, while the Silicia Unit equals 7.5 NTU.

Measuring Principle

Inside the Agricultural measuring device there is an infrared LED installed with 850 nm as a light source. A photodiode positioned in a 90 ° angle to the measuring ray absorbs the light reflected by the particles in the dissolution (diffused light or nephelometric measuring methods for lower measuring range). For higher measuring ranges an additional photodiode is positioned at the opposite side (measurement is performed via transmitted light method). By that the meter determines the turbidity in NTU (FTU). By using infrared LED even measurement of colored dissolution e.g. red wine is possible.

Highlights

- Portable

- High accuracy

- Large LCD screen

- User-friendly keyboard

- Displays turbidity measurements in NTU

Specification

Turbidity
Measuring range	0 ... 50 NTU
Resolution	0,01 NTU
Accuracy	±5% FS or ±0.5 NTU

Turbidity
Measuring range	50 ... 1000 NTU
Resolution	1 NTU
Accuracy	±5% FS or ±0.5 NTU

General technical data
Measuring functions	HOLD, MIN, MAX
Display type	LCD
Display size	2,1 Inch
Standard(s)	ISO 7027
Sensor	Photodiode
Automatic power-off	5 min
Light source	LED, infrared at 850 nm
Measuring angle	90 °
Measurement time	10 s
Calibration	2-point calibration (0 NTU / 100 NTU)
Menu language	English, English (GB)
Protection class (device)	IP20
Power supply	batteries
(Rechargeable) battery	6 x 1,5 V AAA battery , Alkali-manganese
Capacity	1200 mAh
Operating conditions	0 ... 50 °C , 0 ... 85 % RH
Storage conditions	0 ... 50 °C , 0 ... 80 % RH
Dimensions ( L x W x H )	155 x 76 x 62 mm
Weight	320 g