Laboratory-grade performance, in the field – The 2100P Portable Turbidimeter combines microprocessor-controlled operation and Hach's patented Ratio™ optics to bring greater accuracy, sensitivity and reliability to field testing. The two-detector optical system compensates for color in the sample, light fluctuation and stray light, allowing analysts to achieve laboratory-grade performance on a wide range of samples, under a wide range of conditions.
PRINCIPLE OF OPERATION
The 2100P Turbidimeter features a unique optical design that incorporates signal ratioing. Light is focused into a narrow beam and passed through the sample. The 90° scatter detector receives light scattered by particles in the sample. The transmitted light detector receives light that passes through the sample. The signal output of the 2100P is a ratio (based on an algorithm) of the two detectors. By measuring both 90° scattered light and transmitted light, the 2100P compensates for background color, light fluctuations or dust and haze on the optics. Electronically conditioning these signals results in excellent linearity, color rejection and calibration stability.
The 2100P also features a selectable signal averaging mode, which compensates for fluctuations in readings caused by large particles drifting through the light path. Signal averaging eliminates the noise by averaging multiple readings over a period of time and displaying the averaged signal.
Calibration and standardization
Calibration of the 2100P Portable Turbidimeter is based on formazin, the accepted primary standard for turbidity measurement. For convenient routine verification, Hach supplies Gelex (R) Secondary Standards (metal oxide particles locked in gel) formulated to simulate formazin. When checked periodically against formazin, these secondary standards are a simple and accurate means of checking instrument calibration.
The diagnostic mode is accessible with one key stroke. This mode allows the operator to obtain information about operating parameters that can help evaluate instrument functions. The 2100P Portable Turbidimeter is supplied with all necessary testing apparatus, an instrument/procedure manual and a durable carrying case.
When the READ key is pressed, the 2100P Portable Turbidimeter automatically zeros the instrument, compensating for stray light and electronic and optical offsets. No manual adjustment is required.
FEATURES AND BENEFITS
The 2100P Turbidimeter provides direct digital readout in nephelometric turbidity units (NTUs), completely eliminating the need for calculations or interpolation of calibration charts.
With a measurement range of 0 to 1000 NTU and resolution to 0.01 NTU, the 2100P is ideal for regulatory monitoring, process control or field studies. Choose one of three manual range modes (0 to 9.99, 0 to 99.9 and 0 to 1000 NTU) or automatic range mode for measuring samples that vary widely in turbidity.
Outstanding field performance
The light-weight 2100P Portable Turbidimeter comes field ready with four AA alkaline batteries (optional battery eliminator available), all necessary apparatus, and a rugged carrying case. The instrument itself weighs less than 0.45 kg (1 lb). The complete analytical package (including case, apparatus and instructions) weighs just under 2.73 kg (7 lbs).
Minimal training required
Because the 2100P Portable Turbidimeter is so easy to use, personnel can get accurate results even with little training. Each instrument is supplied with a complete instruction manual to guide you step by step through calibration, testing and maintenance procedures. Also included is information on sampling and measuring technique, and a quick reference card to save time during daily operation.