COLO.Science · Technical Specification
VIKING255 | 256 | 257
Table Top Laboratory Turbidity Meter · VIKING250 series
Professional turbidity meter for drinking water, high precision and smart measurement.
4.3" color LCD, 1‑6 point calibration using Formazin standards, stores up to 2000 calibration curves (GLP‑compliant).
Data transfer via USB or RS‑232. Nephelometric principle (90° detection) with 850 nm LED light source, 2 photodiodes, lifetime up to 100 000 h.
Selectable units: NTU, FNU, EBC.
Turbidity
NTU / FNU / EBC
6‑point calibration
2000 curves
USB + RS‑232
90° detection
850 nm LED
100 000 h lifetime
GLP‑compliant
Model series
VIKING255 / VIKING256 / VIKING257 · 4.3" color LCD
Address (HQ)
Polje ob Sotli 4
SI-3255, Slovenia
SI-3255, Slovenia
Contact
VIKING250 series · Table Top Turbidity Meter · Technical Specification
Document ID: COL-TEC-VIK250-EN
Version: Responsive layout
Informational technical sheet · Non-binding · Controlled electronic document
Version: Responsive layout
Informational technical sheet · Non-binding · Controlled electronic document
VIKING250 Series Laboratory Turbidity Meter Drinking water · High precision · Smart · 0–100 / 0–1000 NTU
0.001 NTU resolution
1‑6 point calibration
2000 data sets
USB / RS‑232
Formazin standards
2 photodiodes
Nephelometric 90°
GLP curve storage
Technical overview – common features
| Display | 4.3" color LCD, backlit, user‑friendly interface |
| Light source | LED 850 nm, cold light source, narrowband interference, lifetime 100 000 h |
| Detector | 2 high‑precision photodiodes (90° scattered light, nephelometric principle) |
| Calibration | 1‑6 points using Formazin standards or zero water; user‑defined piecewise curves |
| Data storage | 2000 calibration curves / measurement sets, GLP data review |
| Communication | USB 2.0 and RS‑232 interface (data transfer to PC) |
| Units | NTU, FNU, EBC selectable |
| Ambient temperature | 5 °C … 40 °C |
| Power supply | 220 V ±10% 50 Hz |
| Net / gross weight | 3.5 kg / 4.5 kg |
| Standard accessories | Calibration std. set (0.02 NTU, 10 NTU, 1000 NTU), power cord, manual, dust cover, cuvette set (5 pcs) |
Model comparison – VIKING255 · VIKING256 · VIKING257
| Parameter | VIKING255 (drinking water) | VIKING256 (high precision) | VIKING257 (smart) |
|---|---|---|---|
| Application | Drinking water turbidity | High precision turbidity | Smart turbidity |
| Measuring range (full scale) | 0 … 100 NTU | 0 … 1000 NTU | 0 … 1000 NTU |
| Readout NTU (basic resolution) | 0.001 NTU | 0.01 NTU | 0.001 / 0.01 NTU (auto ranging) |
| Range / resolution details | 0–10 NTU : 0.001 NTU 0–100 NTU : 0.1 NTU |
0–20.00 NTU : 0.01 NTU 20.0–200.0 NTU : 0.1 NTU 200–1000 NTU : 1 NTU |
0–10 NTU : 0.001 NTU 0–100 NTU : 0.01 NTU 0–1000 NTU : 0.1 NTU |
| Accuracy | ±2% + 0.01 NTU (0‑100 NTU) | ±2% + 0.01 NTU (0‑1000 NTU) | ±1% + 0.01 NTU (0‑1000 NTU) |
| Repeatability1 | ±1% of reading or ±0.01 NTU, whichever is greater (under reference conditions) | ||
| Allowed error | ±2% of reading | ||
1 under stable reference conditions
Main features
Measurement & optics
- Nephelometric 90° detection (ISO 7027 compliant principle)
- 850 nm LED + narrowband interference filter
- 2 photodiodes for superior stability
- Cold light source, lifetime 100 000 h
- Selectable units: NTU, FNU, EBC
- High precision light filter system
Calibration & data management
- 1‑6 point calibration with Formazin / zero water
- 2000 calibration curves (GLP‑compliant storage)
- User‑defined piecewise curves & coefficients
- Customize curves per measurement range
- Data transfer via USB or RS‑232 to PC
- Settable user ID, date/time, calibration points
Optical system
Light source: LED 850 nm, cold light, narrowband interference. Detectors: two independent photodiodes for reference and 90° scattered light. Stability: special high precision filter system guarantees long‑term accuracy. Lifetime: up to 100 000 hours.
Accessories, packing & options
| Standard packing | Calibration standard set (0.02 NTU, 10 NTU, 1000 NTU), power cord, instruction manual, dust protection cover, cuvette set (5 pcs) |
| Optional accessories | Additional calibration standards, tungsten lamp, wolfram light source, Bluetooth module, different calibration standards sets |
| Cuvette set | 5 high‑precision glass cuvettes for turbidity measurement (included) |
| Measuring slot | Designed for standard Ø25 mm cuvettes, light‑tight cover |
Applications & included kit
Typical applications
- Drinking water treatment & quality control
- Wastewater effluent monitoring
- Beverage & pharmaceutical process water
- Environmental analysis (rivers, lakes)
- Industrial cooling water
- Research & teaching labs
Included in the kit
- VIKING255 / 256 / 257 instrument
- Calibration std. set (0.02, 10, 1000 NTU)
- 5 glass cuvettes + dust cover
- Power cord (220V/50Hz)
- Instruction manual
- USB cable (optional RS‑232 on request)
Why VIKING250 series
Versatile range coverage
Three models optimised for drinking water (0‑100 NTU), high precision (0‑1000 NTU) and smart multi‑range (0‑1000 NTU with finest resolution).
GLP‑ready data
Store up to 2000 curves with user ID, time stamps and calibration data – full traceability for regulated labs.
Robust optical design
Dual photodiode system, cold LED and interference filter guarantee stable, repeatable readings over years.
Please note: If this turbidity meter series does not exactly match your required range, accuracy or accessory configuration, contact us. Our team can recommend the optimal model (VIKING255, 256 or 257) and additional standards. Technical specifications are subject to change without notice.
Contact & Support
COLO LabExperts
Polje ob Sotli 4
SI-3255, Slovenia
Support note: Contact our team for product configuration, calibration standards, and application‑specific turbidity setups.
Quick contact
Manufacturer & configuration notice:
Specifications in this document are based on the VIKING250 series catalog (VIKING255, VIKING256, VIKING257). COLO.Science reserves the right to change technical specifications without notice.
For procurement and tender purposes, the only valid and binding specification is the official COLO.Science quotation and the accompanying technical specification that is engineering-approved.
Specifications in this document are based on the VIKING250 series catalog (VIKING255, VIKING256, VIKING257). COLO.Science reserves the right to change technical specifications without notice.
For procurement and tender purposes, the only valid and binding specification is the official COLO.Science quotation and the accompanying technical specification that is engineering-approved.