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Water Quality Measurement Instrument:

Mounting / Environment:

Temperature Compensation?

Controller Functionality?

Number of Control Relays:

Display Type:

User Controls:

Electrical Output:

Interface Options:

Battery Powered?

Filters?

Event Triggered?

Built-in or Self-calibration?

Extreme Environment?

Self-test / Diagnostics?

Operating Temperature:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Help with Water Quality Testing Instruments specifications:

Water Quality Measurement Instrument
           
   Your choices are...         
   Interface Level Analyzer       The instrument can detect the level of an oil and water interface. 
   pH       The instrument measures pH. 
   Conductivity / Dissolved Solids       Devices measure conductivity and/or dissolved solids.  
   Suspended Solids       The instrument is capable of measuring suspended solids. 
   Turbidity       The instrument measures turbidity, a light measurement. Particle size and concentration as well as dissolved solids can affect the reading. 
   Dissolved O2       The instrument measures the amount of oxygen dissolved in a sample. 
   Dissolved CO2       The instrument measures the amount of carbon dioxide dissolved in a sample. 
   Oil in Water       Measures the amount of oil in water. 
   Chlorophyll / Algal Pigments       Chlorophyll is the green pigment in plants that provides most of the plant's color and supports the process of photosynthesis. Chlorophyll is found in the cytoplasm of blue-green algae and the chloroplasts of plant cells. Typically, chlorophyll predominates over other photosynthetic pigments and thus is very important in the trapping of solar energy for algal growth processes. Chlorophyll absorbs light from the red and blue regions of the light spectrum. Since green light is reflected rather than absorbed, chlorophyll gives plants their characteristic green color. 
   Voltammetry       Voltammetry varies electric potential while measuring the resultant current, which can be used to determine the chemistry of the conducting medium. This category includes both anodic stripping voltammetry and cathodic stripping voltammetry. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Special Instrument Type
   Mounting / Environment       
   Your choices are...         
   Hand Held       Devices are designed to be operated while held by hand. 
   Portable       Devices have handles, a case, or wheels for ease of movement. They are not necessarily handheld. 
   Modular       Devices are modular and can be interfaced with sensors or input ranges. 
   Lab / Benchtop       Devices are designed to sit atop a bench or desktop in a laboratory. They are not suitable for field use. 
   In-Situ / Field       Devices are designed for in-situ or field use, outside of a laboratory setting. 
   Panel       Devices attach to a panel. 
   Other       Other unlisted, specialized, or proprietary mounting environments. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Instrument Specific Features / Options
   Temperature Compensation       Devices can compensate for changes in ambient temperature. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Controller Functionality       Devices provide some controller functionality, such as set limits and proportional (P) control, proportional integrative (PI) control, or proportional integrative derivative (PIC) control. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Number of Control Relays       The number of control relays. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
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User Interface
   Display Type       
   Your choices are...         
   Analog Meter       Devices have an analog meter, typically with a needle 
   Digital Display       Devices have a digital display.  
   Video Display       Devices have a cathode ray tube (CRT), liquid-crystal display (LCD), flat panel display (FPD), or other multiline display. 
   None       Devices do not have a display. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   User Controls       
   Your choices are...         
   Manual Controls       Has simple front-panel / local controls such as knobs and/or potentiometers. 
   Digital Front Panel       Devices have a digital front panel that is programmed with a keypad. 
   Computer Interface       Devices are programmed with a computer interface. 
   None       Devices do not have user controls. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Output Options
   Electrical Output       
   Your choices are...         
   Analog Voltage Output       The output is an analog voltage. This is a simple, usually linear, function of the measurement. 
   Analog Current Output       The output is an analog current that is imposed on the output circuit proportional to the measurement. Feedback provides the appropriate current, regardless of variables such as line noise and impedance. Analog current outputs or transmitters are often used to send signals over long distances. 
   Analog Frequency Output       The output is an analog frequency, a format which transmits information with continuous physical variables such as voltage amplitude or frequency variations. 
   Switch / Alarm Relay Output       The output is a change-in-state of a switch or alarm. 
   Other Output       Other unlisted output types. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Interface Options       
   Your choices are...         
   Serial       A standard digital output protocol (serial) such as RS232, RS422, RS485, etc. 
   Parallel       A standard digital output protocol (parallel) such as IEEE 488, etc. 
   Other       Any digital output other than the standard serial or parallel signals. Simple TTL logic signals are an example. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Features & Functionality
   Battery Powered       Devices require batteries for full operation, not just a battery backup. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Filters       Devices provide special signal processing or filtering. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Event Triggered       Devices can capture and/or log data when an event happens. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Built-in or Self-calibration       Devices have a built-in calibrator, which can be used for testing and readjustment. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Extreme Environment       Devices are designed to withstand harsh environments with extreme humidity, temperature, dust, etc. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Self-test / Diagnostics       Devices have self-test or diagnostics capabilities. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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Environment
   Operating Temperature       The temperature range over which devices are designed to operate. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
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