The Electronet PH/ORP Transmitter PH-100S is a two-wire system designed for on-line measurement and indication of pH/ORP values, featuring an LCD display and a 4-20 mA DC output. It supports various industrial applications with auto/manual temperature compensation and allows compatibility with any electrode type. The unit offers high accuracy and stability, with calibration and temperature control features to ensure reliable operation.

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SALIENT FEATURES
DESCRIPTION
TECHNICAL SPECIFICATIONS
ELECTRONET
PH/ORP TRANSMITTER
PH-100S
CAT/PH-100S-R1
· On-line measurement. 2 wire system.
· 4-20 mA DC output. Auto/Manual temperature compensation.
· On-Line indication through LCD display.
· Simple operating interface with basic pictographs.
· Easy installation with pre assembled empty enclosure & plug in
terminals.
· Protection Class IP-65
· Software calibration with buffer solution.
Electronet series PH-100S are PH / ORP transmitters used for various industrial applications. It can accept
input from pH / ORP electrode & pH / ORP signal is transmitted in the form of electrical 4 - 20 mA signal. The
on-line pH / ORP indication is provided through LCD. Span/Zero adjustments are easily accessibly. These
transmitters are suitable for any make of electrode.
Type of Input : From pH/ORP Electrode (Compatible to any make Electrode)
Type of Output : 4-20 mA DC, 2 wire Isolated
Display : 8 x 1 LCD/COG Graphics LCD
Calibration Range : 0 to 14 pH /1000 mV
Calibration Method : 2 Point buffer (For pH Only)
Temperature Compensation : Auto / Manual through RTD, Pt 100 sensor for 0-125 °C
Accuracy : ± 0.05 pH / ± 3mV
Isolation : 1.4 KV between Input, Output & Power Supply
Process Connection : 1) Through BNC connector
2) Through Terminals
Power Supply : 24 V DC, External
Power Consumption : < 50 mW
Repeatability : ± 0.05% of span, at 25 °C
Sensitivity : ± 0.02 pH
Stability : 0.02 pH per 24 Hours, non- cumulative
Response Time : < 1000 ms
Temperature Coefficient : ± 0.05% per C
Temperature Drift : ± 0.02% of span per °C (zero & span) at 25 °C
Dimensions : 135 (H) x 182 (W) including cable gland x 200 (D) in mm approx.
Electrical Connections : 3/4” ET
Mounting : 2” Pipe Mounting
Weight : 0.5 kg
Operating Conditions : Temperature 0 to 55 °C / Humidity 5 to 95% non condensing
Housing : Cast aluminium with epoxy coating NEMA 4X (IP-65)
Digital Communication : HART
ACCESSORIES (Optional)
Temperature Compensation Sensor : RTD, Pt 100 (0 - 125 °C)
Flow Through Assembly : SS / PP
Electrode Cleaning System : SS / PP

2. NK Instruments Pvt. Ltd.B-501/504, 5th floor, Raunak Arcade, Near THC Hospital, Gokhale Road, Naupada,
Thane(W) 400602. Maharashtra INDIA Telefax Nos.: 91-22-25301330 / 31 / 32
E-Mail: sales@nkinstruments.com Web: http://www.nkinstruments.com
Skype: nitinkelkarskype Gtalk: nkinstruments2006
Authorised Dealer
ORDERING INFORMATION
*Accuracy defined at lab conditions.
*Due to our continuous product revisions, Design, Specifications and Model Number are subject to change without notice.
Page 2 of 2CAT/PH-100S-R1
SERIES
Temperature
CompensationEnclosure
01 RTD
08 Other
BA 01 02pH-100
Output
01 4-20mA
02 4-20mA
with HART
C 02
DIMENSIONAL & MOUNTING DETAILS
130mm
147 mm
HTIGT WP HE EE
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pH
104mm
155mm
pH-100S
2” PIPE
`U` CLAMP FOR
PIPE MOUNTING
HTIGT WP HE EE
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pH
pH-100S
WALL MOUNT PIPE MOUNT
Input Device
pH Input
LOOP DIAGRAM
4-20mA
Output
Sensor
HART Communicator
Sensor
Signal
AnalogOutput
Output Device
Transmitter Electronics
Module
Microprocessor
Digital PV
POWER SUPPLY Vs LOAD GRAPH
16 18 24 30 36 42
0
250
500
750
1000
1250
1500
With HART Communication
Without HART Communication
500 ohms
1200 ohms
Power Supply Load limitation
Load,ohms
01 Aluminum
Dia cast
02 SS316