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11751 Markon Drive
Garden Grove, CA 92841
USA
Tel 714.895.4344
Fax 714.894.4839
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| All pH circuits require a high impedance
pre-amp to which the electrode connects. This pre-amp will either
be a part of the the meter or is available as a separate external
component. Many process controllers require external preamplifiers,
to match the impedance gain of the electronic circuit to the actual
pH electrode. |
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Sensorex electrodes
can be connected directly to the meter, when the pre-amp is built
into the circuit, and the cables are relatively short.
For longer cable runs (more than about 22 feet or about 7 meters) or where there is significant plant electrical "noise", an external preamplifier will help to provide a cleaner signal. You may even be able to obtain longer life from your pH electrodes! When the Original Equipment Pre-amp
cannot be accessed; (for example, it may be built into a disposable
electrode), a Sensorex Pre-amp will be needed, regardless of the
length of cable. |
click image to enlarge 
| Product Features |
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Battery Powered
Amplifiers
...Offer
Low Cost - In-line design |
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OEM Amplifiers -
....Provide Optimum Service Life |
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Low cost battery powered inline preamplifiers
such as our PHAMP-1 may be adequate to match up to your controller.
The economical Sensorex PHAMP-1 is a battery powered in-line design.
It is designed to boost the signal and lower the impedance from
a pH electrode to a pH monitor, controller or transmitter.
It can be used for long cable runs of up to 1,200 feet (300 meters).
Use this pre-amp when your instrument is not designed to power
a remote amplifier. The PHAMP-1 can also be used to input a pH
electrode signal directly into a device which can accept voltage
inputs. The batteries are sealed, and have an estimated
life of more than 3 years. The PHAMP-1 has an operational output
of +/- 2000 mV. The BNC connector from your coax electrode cable
is attached to the BNC Receptacle input connection on the PHAMP-1.
The output is a BNC connector. You must have a BNR receptacle
on your Cable to connect from the output and go to your controller.
Sensorex provides accessory cables and adapters to make this transition.
The PHAMP-1 is not water proof, you must protect it from water
and the elements.
OEM
line powered preamplifiers are more economical over the long term,
and provide the optimum service life for the majority of installations.
Refer to the Preamplifier Guide (below) to select the Pre-amp
Locate the Original Equipment meter in Column A and order the
Pre-amp listed in Column B. Download pre-amp
wiring diagrams.
Preamplifier Guide
| All controllers not pre-amp ready |
PHAMP-1 |
| Beckman, SoluComp |
U698-03 |
| Beckman, 940 |
V-1 |
| Beckman, 960 |
V-2 |
| Foxboro, 2220 |
V-1 |
| Foxboro, 870, 872, 873, 874 |
V-2 |
| Great Lakes, 60, 70 |
V-1 |
| Great Lakes, 90, 95, 570, 671, 672, 690 300 |
GL90-A |
| Great Lakes, 670 300 |
PHMA |
| L & N, 7073, 7075 , 7082, 7083, 7084 |
V-1 |
| L & N, 7076, 7079 |
V-1-LN |
| Lakewood 820,830, |
V-1 |
| Rosemount/Uniloc, 1000, 1001, 1002, 1003 |
UVA |
| Rosemount/Uniloc, 1050, 1181 |
U2587 |
| Rosemount, 1054, 1054A, SoluComp |
U698-03 |
| Rosemount 2081 |
SDI |
| Signet 710, 719, 750, 9750, 9759, 9030 |
SSA |
Consult
Sensorex for transmitters and controllers not shown in this
listing. |
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| © Copyright 1996-2008 Sensorex Corporation |
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