Model 6536E, 6536P-2, 6528C, 6528B and 7422A
Water quality measurements are performed for water in streams, rivers, lakes and in the groundwater system, using bore holes. There are several different measures for water quality, like electro conductivity (EC), pH ( PH) , dissolved oxygen (DO).
Unidata range of water quality monitoring instruments and probes consists of:
The 6536E Water Electroconductivity Instrument with 6536P-2 Conductivity Probe measures the electro-conductivity and temperature of water. The temperature is measured within the sensing cell to provide precision correction. Both temperature corrected and uncorrected conductivity measurements are available for recording.
A Starlog compatible micrologger is part of the instrument, providing all the standard features such as SDI-12, intelligent battery supervision, modem interface and all the programmability found in Starlog dataloggers.
Ultra low-power consumption makes the instrument ideal for remote, unattended operation. This instrument will operate for months from a single Model 6910A or 12V battery.
6536P-2-X probe is designed for use with the 6536E Water Electroconductivity Instrument. It is available in standard cable lengths of 10m and 20m as well as custom lengths up to and beyond 100m.
Combined with the Starflow 6526H, water flow measurement system, conductivity instrument with probe provides a complete salt load recording package.
The Dissolved Oxygen Probe is a galvanic measuring element which produces a millivolt output proportional to the oxygen present in the medium it is placed in. It consists of an upper part with cathode, anode and cable, and a cap with membrane and electrolyte.
Oxygen diffuses through the membrane onto the cathode, where it reacts chemically and then combines with the anode. This chemical process develops an electric current, which flows through a built-in resistor. The resistor converts the current (microamps) into millivolts. This millivolt signal is led to the Data Logger via a two core cable.
The probe is virtually maintenance free, requiring only that its membrane be kept reasonably clean. The anode remains fully active through its lifetime of several years. The membrane is very robust and can be wiped clean with a cloth or paper. It is recommended that the membrane be cleaned from time to time to ensure maximum reliability.
pH & ORP double junction probes have a rugged design and use a double junction reference system to minimise the effects of contamination due to clogged pores or ingress of sample. They are designed as a low power instrument and include built-in conditioning electronics for direct connection to a Data Logger.
The Model 6528C pH probe consists of a pH sensor with a voltage output that varies proportionately to the hydrogen ion activity between a reference electrode and an electrode immersed in an alkaline (basic) or acidic solution.
Model 6528B is an ORP or Redox probe. It measures the Oxidation-Reduction Potential (ORP) of a solution. The ORP value is a measure of the electron activity of a solution containing a reversible chemical reaction system. Typical applications include water treatment and swimming pool or spa water sanitation.
EC Operating Range: 0 to 200,000uS/cm in three autoranged stages:
|Range||Scale (uS/cm)||Resolution (uS/cm)||Typical Accuracy|
|Low||0 to 200||0.2||+/- 2%|
|Mid||200 to 20,000||2.0||+/- 1%|
|High||20,000 to 200,000||20||+/- 1%|
Temp Range: -20°C to 60°C
Temp Accuracy: ±0.1°C
Temp Resolution: 0.0612°C
EC Temperature Compensation range: 0–60° C
Conductivity: 0–200,000 (uncompensated)
Conductivity: 0–200,000 (temperature compensated)
Conductivity: 0–65,535 (uncompensated). Low resolution for SDI-12
Conductivity: 0–65,535 (temperature compensated). Low resolution for SDI-12
Temperature: -20°C to 60°C
Battery Voltage: 9 to 12V
Scan Rate: 5 seconds to 5 minutes (programmable)
Log Interval: 5 seconds to 1 week (programmable)
Memory: 512K CMOS
Power Source: Internal alkaline battery pack with 12 month life expectancy
External power 9–12V DC can also be connected
Power Consumption: 0.1Ah per day (at 1 minute scan rate), 55mA operating, 50uA standby
Size (HxWxL): 75 x 75x 250mm
Sensor Type: Four Electrode, concentric graphite
Immersion Depth: 36mm minimum to more than 100m
Pressure Resistance: 10 bar
Cell Constant: 0. 475cm-1 ±2.0%
Thermistor Type: Integrated NTC (30kΩ@25°C)
Probe Material: Delrin Housing
Probe Dimensions: 22mm dia x 145mm long
Cable Length: 10, 20, 30, or 50 meters with 7 pin SQL Plug
Range: 0-50mV (2.5 to 5mV per ppm mg/l)
Output impedance: 1kΩ
Type: Galvanic cell, self polarizing, self temperature-compensating
Operating Temp.: 0 to 40°C
Pressure: Submersible to 50m
Size: 58mm diameter, 59mm long
Weight: 350g including cable
6528C and 6528B
Range pH Probe: 0 to 13pH
Range ORP Probe: ±2000mV
Temperature: -5 to 80°C
Type: Teflon, Double junction
Cable: 2 wire shielded, 5 metre
Size: 25mm diameter, 140mm long
Weight: 50 grams
|6536E||Water Electroconductivity Instrument|
|6536P-2-10||Water Conductivity Probe, 10m cable|
|6536P-2-20||Water Conductivity Probe, 20m cable|
|6536P-2-30||Water Conductivity Probe, 30m cable|
|6536P-2-50||Water Conductivity Probe, 50m cable|
|7422A||Dissolved Oxygen Probe|
|6528C||Double Junction, Teflon, pH Probe|
|6528B||Double Junction, Teflon, ORP Probe|
Sales Enquiry Form
Please use the form below for an enquiry to our sales team.
6536E Water Conductivity Instrument