Ion-Selective Ammonia Analyzer / Monitor

THIS PRODUCT IS DISCONTINUED and has been replaced with our Ammonia Analyzer µAI 9046 and µAI 7040 Portable Series.

The Ammonia Analyzer / Monitor employs an ammonia gas sensing probe in a temperature controlled flow cell. The sample of the ammonia anlyzer is first pretreated with two reagent solutions. The first is a complexing agent to prevent hardness precipitation forming in the monitor. The second is an alkaline reagent used to raise the pH to convert the ammonium ion in solution to dissolved ammonia gas detected by the sensor.

The ammonia anlyzer's optimum speed of the response has been achieved by the introduction of sample to the sensor by a unique flowing film technique which eliminates blockage and solids build-up.
 

Range of measurement of the ammonia analyzer can be set to any two consecutive decades of concentration between 0.05 and 1000 ppm as N, NH₃, or NH₄+. The range of 0.05 to 5 ppm makes the monitor ideally suited to river monitoring and potable water intake applications. The 1 to 100 ppm is more suitable for normal sewage effluent applications.

Sample Flow:
5 - 750 ml/min

Suspended Solids:
<10 ppm, <5 microns

Ambient Temperature:
Normally within the range 5- 40°C

Sample Temperature:
Within 20°C of the ambient temperature

Reagent Solutions:
Consumption of each reagent is 10 liters per month.

µAI-8232 Ammonia Monitor (2 Reagents)
     Di-sodium EDTA
     Sodium Hydroxide

Calibration Solutions:
Two solutions each of one liter are required. The concentrations and formulations are suited to range and application. Consumption is 50 to 80 ml per calibration.

Range:
User configurable to any two consecutive decades of concentration between 0.05 and 5000 ppm depending on analysis.

Repeatability:
±2% of reading.

Reproducibility:
±3% of reading.

Response Time:
Less than 5 minutes for 90% step change.

Millivolt Range:
-1000 to + 1000mV.

Millivolt Resolution:
±0.1 mV.

Control Temperature Range:
30 to 45°C.

Temperature Resolution:
±0.1 °C.

Displays:
Concentration: -5 digit blue fluorescent
Information: -20 character dot matrix blue fluorescent

Status Indication:
Two flashing LEDs in alarm state.
Single LED lit when 'HOLD' switch operated.
Single LED lit when calibration is in progress.
Single LED lit when the monitor is 'Out of Service'.

Current Outputs:
As standard one isolated current output 0-1, 0-10, 0-20, or 4-20mA selectable via plug-in links.

Current Output Span:
Any 1 to 2 decades of display range, ogarithmic or linear.

Computer Interface:
Optional second current output or RS422/RS423 serial interface.

Alarms:
Two high or low concentration alarms. Remote calibration in progress indication. Remote 'Out of Service' indication. All voltage free 250V, 5A non-inductive relay contacts.

Concentration Alarm Adjustment:
Programmable over assigned range.

Concentration Alarm Differential:
0 to 5%.

Concentration Alarm Delay:
0 to 60 minutes.

Programmable Date Retention:
3 years.

Calibration:
Fully automatic two point, plus manual initiation on demand.

Routine Maintenance:
Once a month: Replenish reagents, clean flow system. Once a year: Replace pump tubing and pump capstans.

Power Supply:
110-120V or 220-240V, 50/60Hz, 100VA.

Power Supply Tolerance:
+6% to -20%.

Isolation Voltage:
Input, output and power supply 1.5kV.

Dimensions:
Height: 34-3/4" (883mm)
Width: 20-9/10" (531 mm)
Depth: 7-4/5" (199mm)

Degree of Protection:
Electronics Section: NEMA 4X.
Liquid Handling: Critical internal components NEMA 4X.