AIC - Instrumentation for Industry and Laboratory

AMALGAMATED INSTRUMENT CO PTY LTD - NEWSLETTER
October 11th 2001
Issue Number 2

 

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Peter Rienits
Editor

In this issue: Go to AIC's Website
 

pH Sensors with replaceable cartridge.

  • Reduce replacement cost. You only replace the sensor and not the housing, cable etc.
  • Reduce down time. In many applications there is no need to disconnect the cable.
  • Virtually off the shelf. We aim to have any combination available - components in stock
  • Free buffer sachets with every complete electrode purchased.
    pH 4 & 7 buffer sachets allow you to check the whole system.
  • You choose
    • cable length
    • sensor type
    • temperature sensor.
  • More environmentally friendly. Less wastage - all you dispose of is a small sensor cartridge.
Housing with replaceable cartridges

How do I determine the right model for my application?

Decision process:

  1. where and how is the electrode to be installed:
    1. immersed into an open tank.
      1. make an immersion assembly using PVC or S/S fittings.
        Refer to our Application Note "pH probe submersion assembly" (PDF 21k) for the design of an inexpensive immersion assembly
      2. purchase an AIC 0.5m, 1m, 1.5m or 2m immersion assembly.
        Refer to "pH, ORP and Conductivity Immersion Assemblies" (PDF 91k) for details.
    2. fitted into a pipe.
      1. screw into a 3/4"BSP in-line socket or Tee fitting.
      2. purchase an AIC adaptor and screw into 1.25"BSP fitting.
  2. inbuilt temperature or not?
    1. important if the solution temperature varies widely
    2. AIC's standard is Pt1000
  3. what chemicals are involved?
    pH applications range from pure water to harsh chemicals. It is important to check chemical compatibility between the electrode body and sensor materials and the sample being measured. Here are some hints:
    1. pure water - not recommended for current HOB1 models.
      • high purity water is difficult to measure and requires special measuring techniques.
      • consult AIC for alternatives.
    2. clean water with no added harsh chemicals
      • use single junction electrode.
      • if unsure use more chemically resistant sensor.
    3. waste water - plant effluent.
      • better to take a safe approach don't use single junction.
      • if unsure check with AIC.
    4. dairy products.
      • take care - fats/oils on pH glass surface are bad news.
      • may require regular cleaning - try flat glass sensor.
    5. in-line applications.
      • high flow rates can shorten the reference gel life.
      • best choices are flat glass and solid state junction.
    6. highly aggressive applications.
      • probably a good idea to steer clear of these.
      • Stay away from Hydrofluoric Acid.
      • consult AIC we have other electrode types.

So how does the part numbering for the new pH/ORP sensors work?

If you are viewing this newsletter as the HTML version, you will see a templates describing how to "assemble" the part number for the new pH/ORP sensor range. If you can see the template, you can print just the templates (rather than the whole newsletter) if you want a handy reference.
If the templates are displayed with the ADOBE ACROBAT tool bar revealed, click on the "Print" button on the ACROBAT tool bar.
If the ACROBAT tool bar is not revealed, RIGHT CLICK within the template and an ADOBE window will open and you can print from that.

If you cannot see the template when viewing the HTML version of this newsletter, it may be that your browser cannot display embedded objects. Please select the link <a href="../brochures/phorpcd1.pdf">Template to generate pH &amp; ORP electrode Order Code</a>  
Here are the variations currently available
Replaceable cartridges for pH
Order Code Description Price
P-PH-HLSP-SJ01single junction - conical glass $150.00
P-PH-HOB1-0005Teflon double junction - flat glass $220.00
P-PH-HOB1-0007 Teflon double junction - round glass$220.00
P-PH-HJRB-SS01Solid State junction - round glass$270.00
P-PH-HJFG-SS01Solid State junction - flat glass$270.00
Replaceable cartridges for ORP (Redox)
P-OR-RBLP-SJ01 single junction - platinum pin$160.00
P-OR-ROB1-0001 Teflon double junction - platinum ring $265.00
P-OR-RJRB-SS01 Solid State junction - platinum ring $295.00
Add the cartridge price to the sensor body price
Sensor body with:
replaceable housing 1m cable and no temperature sensor $160.00
5m cable and no temperature sensor $170.00
10m cable and no temperature sensor$190.00
 
1m cable and Pt1000 temperature sensor$170.00
5m cable and Pt1000 temperature sensor $185.00
10m cable and Pt1000 temperature sensor $205.00
 
1m cable and Pt100 temperature sensor $170.00
5m cable and Pt100 temperature sensor $185.00
10m cable and Pt100 temperature sensor $205.00

 

Here's an example:
You want to order a pH electrode for a relatively clean wastewater application.
The electrode is to be mounted on a 1m standpipe into an open tank. The transmitter is close-by so you only need a 5m cable.
The temperature does not vary greatly but, considering it costs only marginally more to get a sensor with inbuilt temperature sensing, you might as well get that too.

So you choose a P-PHAN051K05MBN at a cost of $405.00 list price.

For this you get the sensor body with 5m cable and Pt1000 and pH sensor cartridge in a nice box. In the box you also get 2 free buffer sachets and instructions

In future the replacement cartriges will only set you back $220.00 (list price).

Please note: the above prices are our current prices and subject to change. The prices are in Australian dollars, do not include freight or GST.

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pH & ORP monitoring and control instruments

AIC also designs and manufactures a wide range of instrumentation to take full advantage of the wide range of pH and ORP electrodes available.
Some of these are listed below.

PM4-PH panel mount pH monitor PM4-PH Panel Mount pH monitor/control. Single pH input with temperature compensation input. The model offers a very wide range of displays, supply power and output options.
PM4-OR Panel Mount ORP monitor/control. Single ORP input with temperature compensation input. The model offers a very wide range of displays, supply power and output options.
PM4-PH Brochure, PM4-OR Brochure
RM4-PH DIN rail mount pH monitor RM4-PH DIN Rail mount monitor/control for pH or ORP applications. This instrument is equipped with a single pH or ORP input with temperature compensation input. The RM4-PH features a wide range of power supply and output/retransmission options.
RM4-PH Brochure
RT4-PH field mount, loop powered pH/ORP display/transmitter RT4-PH FIeld mount, loop powered display/transmitter. This instrument accepts a single pH or ORP electrode and can also accept a temperature probe for compensation measurements. The RT4 is powered by a 2 wire loop and converts the pH or ORP signal to a fully isolated 4-20mA analog retransmission. The instrument has a 4 digit LCD display. The field mount enclosure is IP65 rated.
RT4-PH Brochure
HH4-PH hand held pH monitor HH4-PH Hand held pH meter. This instrument accepts a single pH electrode and can also accept a temperature probe for compensation measurements. The HH4-PH is powered by a single 9V battery and offers full calibration functions. The display is 4 digit LCD and the instrument features and automatic "switch off" to conserve battery life. The HH4-PH can also be used for ORP measurement with the display showing millvolts (mV)
HH4-PH Brochure
TP4-PH IP65 wallmount pH monitor TP4-PH This wall mounted IP65 protected unit offers superb flexibility. With two pH or ORP inputs and one temperature compensation input, it allows for the close monitoring of multiple points in a process. Four on-board setpoint relays allow the instrument to be used for alarm and control. Relays 1 & 2 also offer Proportional/Integral (PI) control capability.
TP4-PH Brochure

A datalogging feature is available as an option for the TP4-PH (and other TP4 and TP488 instrumentation). On-board memory can store data and this can be downloaded via a serial retransmission. AIC makes a suite of software available as part of this feature. The data logger software runs on a Windows TM based PC and offers the ability to develop highly configurable graphs as well as the ability to store the data in spreadsheet format. The datalogger feature is available in 32K or 128K memory sizes and the amount of data stored depends on the sample interval.

As an example, with the 128K memory size installed and with a sample rate of one sample per hour, the TP4-PH would store up to 266 days of data (that's over 8 months!).

Software is available for "live" downloading of data from a PM4-PH or RM4-PH equipped with a serial retransmission option. As with the TP4 feature, the software can develop graphs for monitoring purposes.
Datalogging Feature brochure

For information on all AIC's pH and ORP products - visit the pH and ORP Applications page.

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