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pH 902 portable pH-meter

Robust, intuitive portable device for routine daily measurements in laboratories and processes

Portable pH-meter mod. 902, the basic version for mobile pH measurement.

Clever - Ergonomically optimized for on-site and laboratory use.
The integrated but removable quiver protects the sensor. The multi-functional hook ensures freedom of movement by allowing the devices to be hung up or positioned upright together with the reversible protective cover.

Robust - The robust and chemical-resistant housing even survives the standardized drop test from 1 meter onto concrete. High-contrast LCD with scratch-proof mineral glass screen can still be read perfectly after many years.

Long-lasting -  The devices enable over 1,000 hours of measurement with one set of batteries (4 x AA).

Code  Description
KN/75001012 Mod. 902 pH complete of electrode POLYPLAST DIN , temperature sensor PT 1000,  pH 7.00 and 4,00 90 ml pH buffers and instructions for use, in carrying case
KN/75001022 Mod. 902 pH without electrode but with temperature sensor PT 1000 , S7 cable with DIN connector,  accessories
KN/75001002 Mod. 902 pH only instrument, without accessories

Robust, intuitive portable device for routine daily measurements in laboratories and processes. Over 1,000 operating hours with a single set of batteries (4x AA).

Features

  • A sensor quiver protects the sensor from drying out or being damaged in daily use
  • The high-performance polymer housing ensures low water consumption and high impact resistance
  • Over 1,000 hours of measurement with a single set of batteries (4x AA)
  • Memosens sensors and pH sensors can be used on one device (e.g special flat-membrane sensors)
  • The mineral glass display is perfectly readable even after years

Specifications

pH/mV input (analog) pH socket, DIN 19 262 (13/4 mm)
pH range -2 … 16
Decimal places*) 2 or 3
Input resistance 1 x 1012 Ω (0 … 35 °C)
Input current 1 x 10-12 A (at RT, doubles every 10 K)
Measuring cycle Approx. 1 s
Measurement error1,2,3) < 0.01 pH, TC < 0.001 pH/K
mV range -1300 … +1300 mV
Measuring cycle Approx. 1 s
Measurement error1,2,3) < 0.1 % meas. val. + 0.3 mV, TC < 0.03 mV/K
Temperature input 2 x 4 mm dia. for integrated or separate temperature detector
Measuring ranges NTC 30 kΩ -20 … +120 °C Pt 1000 -40 … +250 °C
Measuring cycle Approx. 1 s
Measurement error1,2,3) < 0.2 K (Tamb = 23 °C); TC < 25 ppm/K
Memosens pH input (also ISFET) M8 socket, 4 pins, for Memosens lab cable
Display ranges4) pH -2.000 … +16.000 mV -2000 … +2000 mV
Temperature -50 … +250 °C
Memosens ORP input M8 socket, 4 pins, for Memosens lab cable
Display ranges4) mV -2000 … +2000 mV
Temperature -50 … +250 °C
Sensor standardization*) ORP calibration (zero adjustment)
Permissible calibration range ΔmV (offset) -700 … +700 mV
Sensor standardization*) pH calibration
Operating modes*) Calimatic Calibration with automatic buffer recognition
Manual Manual calibration with entry of individual buffer values
Data entry Data entry of zero and slope
Permissible calibration range Zero point 6 ... 8 pH With
ISFET: -750 … +750 mV Operating point (asymmetry)
Slope Approx. 74 … 104 %
Calibration timer* Interval 1 … 99 days, can be switched off
Sensoface Provides information on the sensor condition Evaluation of zero/slope, response, calibration interval
Connections 2x socket, 4 mm dia., for separate temp. detector 1x M8 socket, 4 pins, for Memosens lab cable 1x pH socket, to DIN 19262
Diagnostics functions Sensor data (only Memosens) Manufacturer, sensor type, serial number, operating time
Calibration data Calibration date, zero and slope
Device self-test Automatic memory test (FLASH, EEPROM, RAM)
Device data Device type, software version, hardware version
Data retention Parameters, calibration data > 10 years
EMC EN 61326-1 (General Requirements)
Emitted interference Class B (residential area)
Immunity to interference Industry
EN 61326-2-3 (Particular Requirements for Transmitters)
RoHS conformity According to directive 2011/65/EU
Power supply 4x AA batteries
Operating time Approx. 1000 h (alkaline)
Nominal operating conditions Ambient temperature -10 … +55 °C
Transport/Storage temp. -25 … +70 °C
Relative humidity 0 … 95 %, short-term condensing allowed
Housing Material PA12 GF30 + TPE
Ingress protection IP66/67 with pressure compensation
Dimensions Approx. (132 x 156 x 30) mm
Weight Approx. 500 g


*) user-defined
1) According to EN 60746-1, at nominal operating conditions
2) ± 1 count
3) Plus sensor error
4) Ranges depending on Memosens sensor


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