Laboratory Conductivity Meter ST 700
- Measuring ranges from 0.000 µS/cm to 2000 mS/cm
- 1.000 µS/cm … >1000 mS/cm with one sensor
- Records for QM documentation according to ISO 9000 and GLP
- Calibrated analog recorder output, galvanically isolated
- Sensoface: monitoring of the sensor and equipment
- Automatic calibration with standard solutions
- EMC according to NAMUR
- RS-232 interface for computer and printer
- Simultaneous display of two measurement values
- Self-contained clock
- Leak-proof membrane keyboard
- Robust housing
- Protection category IP 54
- 3-year warranty
Specification :
| Equipment | Meter with power cord, without sensor |
| Ranges | Cond: 0.000 … 9.999 μS/cm; 00.00 … 99.99 μS/cm; 000.0 … 999.9 μS/cm; 0.000 … 9.999 mS/cm; 00.00 … 99.99 mS/cm; 000.0 … 999.9 mS/cm; 0000 … 2000 mS/cm; auto-ranging or manual preset °C: –50.0 … +150.0 |
| Display | Alphanumer. 2 x 4-digit, 14-segment LED, character height 13 mm, measurement symbols:20 °C, 25 °C, μS/cm, mS/cm, %/K, °C, Time, 3 Sensoface icons inform on sensor and measuring equipment (GLP) |
| Measuring cycle | Approx. 1.5/sec |
| Measuring frequencies | Approx. 40 Hz to 2 kHz, automatic adjustment by conductance |
| Resolution | Up to 0.001 μS/cm |
| Accuracy | Cond: <0.5 % meas. value. ±2 counts °C: 0.3 K |
| Reproducibility | <0.1 % meas. val. |
| Temperature compensation | –50 … +150 °C; Pt 1000/NTC 30 kOhm (autom. selection) or manual, Linear TC characteristic 0.00 … +9.99 %/K, ref. temperature 20 °C/25 °C selectable |
| Adm. cell constant | 0.001 … 199.9 cm–, adjustable |
| Sensor standardization | Operating modes – Automatic by determining the cell constant with NaCl or KCl solution Calibration solutions: KCl 0.01 mol/l; 0.1 mol/l; 1 mol/l; NaCl 0.01 mol/l; 0.1 mol/l; saturated – Direct entry of cell constant |
| Monitoring of sensor and equipment (GLP) | Sensoface provides information: – for selection of 2-electrode sensors – on too great a difference between reference and measuring temperature – for handling of 4-electrode sensors – on clock memory loss – in case of irregular checking of measuring equipment – Optical display: good/average/poor |
| Device self-test | Test of measuring electronics including recorder output, segment and keypad test, RAM, EPROM, and EEPROM test during diagnostics, automatic short check at power-on |
| GLP records (ISO 9000)
| Parameter settings, calibration, device diagnostics |
| Recorder output | Galvanically isolated (isolation voltage: 40 V DC, 20 V AC) Cond: 1 mV/μS · cm–!; 1 mV/mS · cm–!; °C: 10 mV/°C user-defined for printer control |
| Interface
| RS 232 without control lines, galvanically isolated (isolation voltage: 40 V DC, 20 V AC), user-definable as printer or computer interface,Baud rate: 600 / 1200 / 2400 / 4800 / 9600 Data bits/parity: 7/Even, 7/Odd, 8/No Protocol: none, XON/XOFF Stop bits: 1 |
| Software | Control of the Model ST 700 Laboratory Conductivity Meter is integrated in the automation software for lab meters “labworldsoft” for display and control of device functions for Version 4.0 or higher |
| Clock | Real-time clock with date, self-contained |
| Calibration data storage | Automatic storage of cell constant and calibration procedure with time and date stamp, self-contained |
| Data retention
| Parameters, statistics, and factory settings: >10 years (EEPROM) Clock: reserve power >1 year (battery-backed) |
| Protection against electrical shock | Protective separation as defined in DIN 57100 / VDE 0100 Part 410 and DIN VDE 0106 Part 101, power supply against all other inputs and outputs, in accordance with the NAMUR recommendation “Extra-low voltage circuits with protective separation” |
| EMC directive | 89/336/EEC |
| Standards | EN 61326 / VDE 0843 Part 20: 2002-3 |
| Ambient temperature Storage and transport temp | 0 … +45 ؛C –20 … +70 ؛C |
| Power supply | 230 V –15 % +10 %, 48 … 62 Hz, <10 VA, Option 363: 115 V AC |
| Sensor connection | The meter allows connection of any 2-electrode sensors with banana plug.Special diode plug for 4-electrode sensors |
| Enclosure | Glass-reinforced polyamide 12, stainless steel cover, IP 54 protection, prepared for connecting ZU 6954 attachable stand |
| Dimensions (W x H x D) | 244 x 95 x 255 mm |
| Weight | Approx. 2 kg |
Accurate, Reliable Conductivity Measurement for Every Laboratory and Field Application
Laboratory Conductivity Meter ST 700 Ensure precise water quality assessment, process control, and solution analysis with our range of conductivity meters—trusted tools for measuring the electrical conductivity (EC) of liquids in laboratories, industrial plants, environmental monitoring, aquaculture, and educational settings. Designed for accuracy, durability, and ease of use, our conductivity meters deliver consistent performance across a wide range of concentrations, temperatures, and sample types.
Engineered for Precision and Flexibility
Whether you’re testing ultrapure water, monitoring boiler cycles, checking nutrient levels in hydroponics, or validating cleaning processes, our conductivity meters adapt to your needs with advanced features and robust construction.
- Wide Measurement Range – From 0.01 µS/cm (ultrapure water) to 2,000 mS/cm (concentrated solutions), with auto-ranging capability.
- Automatic Temperature Compensation (ATC) – Built-in sensors correct readings to standard 25°C for lab-grade accuracy.
- Multiple Calibration Options – 1- to 3-point calibration with standard solutions for optimal reliability.
- Durable Probes & IP-Rated Meters – Waterproof (IP67) handheld models and chemical-resistant electrodes for harsh environments.
- Data Management – GLP-compliant logging, timestamped storage, and USB/Bluetooth export on select models.
- Multi-Parameter Capability – Many models also measure TDS, salinity, and resistivity from the same reading.
Trusted Across Industries
Used in pharmaceutical manufacturing, wastewater treatment, food & beverage production, and research labs worldwide, our conductivity meters meet ISO, ASTM, and USP standards for quality and traceability. Their intuitive interfaces require minimal training, while rugged designs ensure longevity—even under daily use.
From benchtop precision to portable field testing, our conductivity meters give you the confidence to make data-driven decisions—quickly and accurately.
Choose a solution that grows with your application—because conductivity matters in every drop.
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