Knick SE101-MS Instructions For Use Download Page 2

Knick Elektronische Messgeräte GmbH 

& Co. KG 

Beuckestraße 22

14163 Berlin

Germany

Phone:   +49 30 80191-0

Fax:  

+49 30 80191-200

Email:   [email protected]

Web: www.knick.de

SE101-MS

Manual

SE101-MS pH Sensor: Instructions for Use

!

WARNING – Failure to observe this warn-

ing may result in serious injury.

The safety alert symbol on the nameplate 

means:

Read these instructions for use, observe the Spec-

ifications, and follow the Safety Instructions. 

1  Safety Instructions

Hazards due to pressure, temperature, or aggressive 

media are possible, depending on the location of 

use. Therefore, the operation and servicing of the 

sensor shall only be carried out by suitably trained 

personnel authorized by the operating company. 

Be sure to wear safety goggles and gloves when 

cleaning or calibrating a sensor using acid or alka-

line solutions.

2  Sensor Description and Intended Use

The SE101-MS sensor is equipped with Memosens 

technology. The benefits are a safe function due to 

perfect galvanic isolation, digital data transmission 

and an integrated sensor diagnostics, among others. 

The connection is insensitive to dirt and humidity.  

The integrated temperature detector provides auto-

matic temperature compensation during calibration 

and operation of the sensor. The sensor is designed 

for simultaneous measurement of pH and tempera-

ture in industrial processes, particularly in the field of:

drinking water, wastewater, water processing.

The markings on the sensor or on the packaging label 

include the following information:

Manufacturer of sensor

MEMO

SENS

Memosens logo

SE101-MS

Model

0 … 14

pH range

-5 … 80 °C

Temperature range

CE conformity mark

The calibration data, operating time, sensor desig-

nation, and serial number are stored in the sensor 

head. The serial number is also printed in the quality 

certificate and on the packaging label. The sensor fits 

into the sensor quiver of a portable meter from the 

Portavo series. 

The O-ring 

3

 seals the quiver.

3  Commissioning

 • On unpacking, check the sensor for mechanical 

damage. Report any damage to your Knick service 

team.

 • Remove the watering cap and briefly rinse the sen-

sor with pure water. After rinsing, the sensor should 

only be dabbed dry with a tissue. Do not rub the 

pH-sensitive glass, since this can lead to electrostat-

ic charging and sluggish response times.

 • Connect sensor and cable.

4  Operation

4.1 Calibrating the Sensor

2-point calibration is recommended for the SE101-

MS sensor. The sensor is dipped successively into two 

different buffer solutions with given pH values (e.g., 

pH 7.00 and pH 4.00). Please refer to the user manual 

of the pH transmitter for further details. The resulting 

calibration data (slope and zero) are saved directly in 

the sensor. Memosens sensors can be pre-calibrated 

in the lab. Therefore, calibration on site is not nec-

essary.

4.2 Positioning

The sensor can be operated vertically or inclined up 

to 15° off horizontal.

5  Maintenance and Cleaning

Never keep or store the sensor dry! You should store 

the sensor with fitted watering cap containing elec-

trolyte (3 mol/l KCl). Clean the sensor (glass mem-

brane and junctions) with clean water after each pro-

duction cycle and regularly in case of heavy pollution.

6  Specifications

Model:

SE101-MS

pH:

0 … 14

Temperature:

-5 … 80 °C

Length:

110 mm

Glass membrane: approx. 50 MΩ (25 °C)
Junction:

2 ceramic junctions

Body material:

polysulfone

Reference system: Ag/AgCI with polymer 

 electrolyte

7  CaliMat pH Buffer and KCl Solution

Order No.

Buffer

4.00 ( 20 °C)

CS-P0400/250

Buffer

7.00 ( 20 °C)

CS-P0700/250

KCl solution 3 mol/l

ZU 0960

For more buffer solutions and electrolytes, see  

www.knick.de

8  Disposal

Observe the applicable local or national regulations 

for disposal.

Ø 12 mm

MEMO

SENS

5

4

110 mm

3

1

1

Memosens connector

2

Serial number

3

O-ring seal for quiver

4

Nameplate

5

Plastic body 

6

Junctions

7

pH glass

8

Protective bars

7

8

2

6

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