Biolin – Force Tensiometers

State of the art force tensiometers with outstanding versatility and high level of automation. Fully automated critical micelle concentration (CMC) determination with high accuracy. A standalone force tensiometer with automated sample stage for precise measurements. Easy to operate.

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Overview

Features

Specifications

Full Automation for High Precision
The systems can be fully automated, avoiding user variation and saving you time. Highly precise measurements can be performed easily with just one click.

Sigma Peak
One Instrument for Research and Routine — Sigma Peak brings together premium automation, advanced measurement capabilities and stand-alone convenience to deliver reliable surface and interfacial tension data, day after day. Whether you’re optimizing formulations, qualifying raw materials or running method development, Sigma Peak is your central force tensiometer tool. Run advanced R&D studies and routine quality checks on the same platform, with consistent hardware and data handling.

Sophisticated Software
The OneAttension Software provides all measurement modes, full automation, easy measurement setup and live results — and it’s really user-friendly and intuitive.

Key Features

Quick measurement: No need for a computer — Sigma Peak and Sigma Solo both run in standalone mode via touchscreen
Instant Results: Results shown on-screen immediately after measurement completes
High precision: Built-in highly sensitive balance, with LED-guided sample placement
All-inclusive OneAttension software: unlimited licenses, free automatic updates/upgrades
No hidden costs: pre-assembled, pre-defined measurement scripts, automatic probe alignment
Easy result transfer: USB-C data export, PDF reports, up to 100 measurements stored on-instrument (Solo/Base)

Technical Specifications

Available Measurements	Sigma Peak	Sigma Solo	Sigma Base	Sigma CMC	Sigma Transformer Oil
Surface tension	V	V	V	V	V
Interfacial tension	V	V	V	V	V
Critical micelle concentration	Automatic*	Manual	Manual	Automatic	Manual
Dynamic contact angle	V	–	–	V	–
Surface free energy	V	–	–	V	–
Powder wettability	V	–	–	V	–
Density	V	V	V	V	V
Sedimentation	V	–	–	V	–
Adhesion force	V	–	–	V	–

Balance Specifications	Sigma Peak	Sigma Solo	Sigma Base	Sigma CMC	Sigma Transformer Oil
Measuring range (mN/m)	1…2000	1…2000	1…1000	1…2000	1…2000
Displayed resolution (mN/m)	0.001	0.01	0.01	0.001	0.01
Density range (g/cm³)	0…2.2	0…2.2	0…2.2	0…2.2	0…2.2
Density resolution (g/cm³)	0.001	0.001	0.001	0.001	0.001
Maximum load (g)	250 / 210*	5	5	250 / 210*	5
Weighing resolution (µg)	100 / 1*	10	10	100 / 1*	10
Force resolution (µN)	1 / 0.01*	0.1	0.1	1 / 0.01*	0.1
Contact angle range	0…180°	–	–	0…180°	–
Contact angle resolution	0.01°	–	–	0.01°	–

Measuring Unit Specifications	Sigma Peak	Sigma Solo	Sigma Base	Sigma CMC	Sigma Transformer Oil
Sample stage	Motorized	Motorized	Manual	Motorized	Motorized
Sample stage speed (mm/min)	0.001…800	0.001…800	–	0.001…800	0.001…800
Stage travel distance (mm)	125	125	–	125	125
Stage positioning resolution (nm)	16	16	–	16	16
Dimensions W×D×H (mm)	265×300×500	265×300×500	275×155×392	265×300×500	265×300×500
Weight (kg)	17	15	5	17	17
Power supply (VAC)	100–240	100–240	100–240	100–240	100–240
Power consumption (W)	20	20	7	20	20
Frequency (Hz)	50–60	50–60	50…60	50–60	50–60

* = optional configuration. – = not available / not applicable. All specifications subject to change without notice — Biolin Scientific.

Available Models

Sigma Peak brings together premium automation, advanced measurement capabilities and stand-alone convenience for reliable surface and interfacial tension data. Optimizing formulations, qualifying raw materials or running method development — Sigma Peak is your central force tensiometer tool.

What you can measure: Surface tension / interfacial tension (Du Noüy ring, Wilhelmy plate or rod), Dynamic contact angle, Adhesion force, CMC, Sedimentation, Density, Powder wettability.

Fully automated critical micelle concentration (CMC) determination with high accuracy. Sigma Peak extended with an advanced sample stage, a Wilhelmy plate, and two Titronic dispensers for automated concentration gradient — enabling CMC determination without user intervention.

Sigma Solo is an accurate standalone force tensiometer with automation for routine testing and quality control. Measure surface and interfacial tension or liquid density within minutes via the integrated touch display. Fully automated, single-tap operation with guided on-screen measurement.

What you can measure: Interfacial tension, Surface tension (Du Noüy ring, Wilhelmy plate or rod), Density.

Evaluate transformer oil quality against a chosen standard with Attension Sigma Transformer Oil. Based on the Sigma Solo frame, with measurements according to ASTM D971 and IEC 62961 standards, in addition to regular surface/interfacial tension and density measurement.

Sigma Base is a manual standalone force tensiometer for simple research and quality control. Robust design and easy operation, ideal for educational use. Measure surface and interfacial tension using Du Noüy ring, surface tension using the Wilhelmy plate, and liquid density. No PC needed — a digital balance offers Huh-Mason, Zuidema-Waters and uncorrected results for the Du Noüy ring.