M-21 pH Probe
M-21 $665.00 Excl. GST
Back to products
Jumo ecoTRANS pH 03 - pH Transmitter
ecoTRANS pH03 $1,028.00 Excl. GST
Intech LPI-pH - pH Transmitter
Click to enlarge

LPI-pH – pH Transmitter

Brand:

$935.00 Excl. GST

Total: $935.00

All prices are in NZ$, and GST exclusive and are subject to change without notice.

Product Details

The LPI-pH is a loop powered, isolated, pH Cell input, to 4~20mA output transmitter, with integral RTD Pt100 temperature compensation, and LCD display of 0~14.00pH.

The LPI-pH is the device to choose when a pH probe is installed in a corrosive, damp, high earth current or electrically noisy environment.

The IP67 rating of the transmitter enclosure, together with the corrosion proofed circuit board, give the LPI-pH high immunity to damp and corrosion, allowing it to be mounted close to the pH probe. Having the transmitter close to the pH probe means that the highly sensitive pH probe output signal is amplified and turned into a robust 4~20mA signal before noise exposure from long cable runs can effect it.
The unit also features internally accessible, finger adjustable, 15 turn slope and offset adjustments, for easy calibration of the pH sensor, in conjunction with the LCD Display.

The 4~20mA output from the LPI-pH can be run for long distances to better environments where standard process controllers can be used safely.

The LPI-pH fills a niche where it has often been necessary to install low IP rated, dedicated pH instruments in an aggressive environment.

LPI-pH Features

  • Isolated Input to Output 2.0kV
  • Bi-Polar pH Cell Input
  • IP67 Rated Enclosure
  • Liquid Crystal Display (LCD) 0~14.00pH
  • High Accuracy
  • 40~200mV Output Test Signal
  • Low Cost
  • Easy to Install
  • Reverse Polarity Protection
  • Internally Accessible, Finger Adjustable, SLOPE & OFFSET Adjustments
  • Selectable, Automatic or Fixed Probe Temperature Compensation
  • Corrosion Proofed Circuit Boards & Components by Isonel 642 (Except terminals & DIP Switch)

Technical Specs

TYPELPI-pH
Input-pH-379.0~379.0mV, Standard Calibration (pH Probe @ 20°C)
-TemperaturePt100 RTD, 0°C~100°C
pH Input Impedance1012Ω
Slope Adjustment Range200~420mV Standard Calibration
Offset Adjustment Range±10% Standard Calibration
Display-Display12.5mm, 3½ Digit, LCD
-Resolution0.01pH
General Specifications
Output-mA2 wire 4~20mA (Loop Powered)
-mVTest 40~200mV ±1% @ 4~20mA, Other Test Voltages Available e.g. 1~5V
Note: mV Test Increases Power Supply & Decreases Load Resistance
Power Supply11~33Vdc
Supply Voltage Sensitivity<±0.005%/V FSO
Output Load Resistance 650Ω @ 24Vdc (50Ω/V Above 11Vdc)
Maximum Output CurrentLimited to <28mA
Accurate to<±0.1% FSO Typical
Linearity & Repeatability<±0.1% FSO Typical
Ambient Drift<±0.02%/C FSO Typical
Noise Immunity125dB CMRR Average (2.0kV RMS Limit)
EMC CompliancesEmissions EN 55022-A, Immunity EN 50082-1, <1% Effect FSO Typical
Isolation Test Voltages2000Vac/dc Input to Output for 1min
Operating Temperature0°C~70°C
Storage Temperature-20°C~80°C
Operating Ambient Humidity5~85%RH Max, Non-condensing
Construction-EnclosureIP67 Rated, Impact Resistant, Polycarbonate
-GlandsIP68 Rated Nylon, Rated to UL94-V2 to Take 3~6mm Cable Size
-DimensionsL=140, W=80, H=65mm, excluding glands

Documents