CIRAS-4 Portable Photosynthesis System

Brand: PPSystems
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Brand: PPSystems

Product Code: CIRAS4

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Specifications: (see all)

Measured / controlled parameters

Photosynthesis rate (A), transpiration (E), stomatal conductance (gs), internal CO₂ concentration (Ci), chlorophyll fluorescence (Fv/Fm, Yield), leaf and air temperature, humidity, light intensity, pressure.

Measurement / analysis range

CO₂: 0–10 000 µmol mol⁻¹; H₂O: 0–75 mmol mol⁻¹; temperature: –5 … +50 °C; PAR: 0–2500 µmol m⁻² s⁻¹.

Measurement accuracy / precision

CO₂ ± 3 µmol mol⁻¹ at 300 ppm; H₂O ± 0.1 mmol mol⁻¹ or < 1 %; temperature ± 0.2 °C.

Analysis method / operating principle

Leaf gas-exchange by open/closed chamber method with four independent IR gas analyzers (CO₂/H₂O) and full microclimate control.

Analysis / measurement time

From 1 second up to continuous monitoring (depending on mode).

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The CIRAS-4 Portable Photosynthesis System by PP Systems (UK/USA) is a state-of-the-art field and laboratory instrument designed for precise measurement of leaf gas exchange (CO₂ / H₂O) and chlorophyll fluorescence. It enables real-time assessment of photosynthetic performance, CO₂ assimilation rate, transpiration, and water-use efficiency — making it an indispensable tool in plant physiology, agronomy, and environmental research.

The CIRAS-4 is equipped with four independent infrared gas analyzers for CO₂ and H₂O, providing exceptional accuracy, stability, and rapid response. The leaf cuvette offers full environmental control — adjustable temperature, humidity, light intensity, and CO₂ concentration — allowing simulation of natural or experimental photosynthesis conditions.

Its high-contrast color touchscreen display ensures full visibility even in direct sunlight, while the internal 32 GB memory stores thousands of data points. USB and Wi-Fi interfaces enable seamless data transfer and integration with analytical software. Powered by lithium-ion batteries, the system provides up to 16 hours of continuous operation, ideal for field studies.

Compact, lightweight, and rugged, the CIRAS-4 is the perfect solution for research on photosynthesis efficiency, plant physiology, breeding programs, and agro-ecological monitoring.

Tags: Soil and plant analysis

Soil and plant analysis

Measured / controlled parameters

Measurement / analysis range

CO₂: 0–10 000 µmol mol⁻¹; H₂O: 0–75 mmol mol⁻¹; temperature: –5 … +50 °C; PAR: 0–2500 µmol m⁻² s⁻¹.

Measurement accuracy / precision

CO₂ ± 3 µmol mol⁻¹ at 300 ppm; H₂O ± 0.1 mmol mol⁻¹ or < 1 %; temperature ± 0.2 °C.

Analysis method / operating principle

Leaf gas-exchange by open/closed chamber method with four independent IR gas analyzers (CO₂/H₂O) and full microclimate control.

Analysis / measurement time

From 1 second up to continuous monitoring (depending on mode).

Sample volume / sample volume range

Leaf chamber volume ≈ 4 cm³ (leaf area ≈ 2 cm²).

Applicable media

Living plants – leaf samples in natural or controlled environments.

Sensor / electrode / probe / indicator type

Two IR gas analyzers for CO₂ and H₂O (reference + sample); Pt100 temperature sensors; humidity and PAR sensors.

Number of channels / measurement points

4 gas-analysis channels + multi-parameter chamber (up to 10 simultaneous measurements).

Temperature compensation

Fully automatic compensation via internal temperature and humidity sensors.

Number of calibration points / calibration method

Two-point calibration of CO₂ and H₂O using reference gas mixtures; auto-zero calibration.

Housing / chamber / tip material

Aluminum console housing; stainless-steel and plexiglass chamber with optical window and sealed connections.

Design and features

Modular design (console + chamber); built-in gas analyzers; 5.7″ color touchscreen; ergonomic handle.

Lighting / climate control system

Built-in PAR LED light (0–2500 µmol m⁻² s⁻¹); controlled temperature, CO₂ and humidity inside the chamber.

Number of programmable cycles / automatic modes

Up to 500 programmable measurement sequences; auto-logging and real-time graphing.

Interfaces and outputs

USB, Wi-Fi, Bluetooth interfaces; input for external sensors and accessories.

Software / PC compatibility

CIRAS Data Acquisition Software (Windows); Excel/CSV export; compatible with WinControl and PP Systems interface.

Memory / data storage functions

Internal 32 GB memory (> 1 million data points); auto-save and USB/Wi-Fi export.

Operating conditions

Operating temperature –5 to +50 °C; humidity up to 95 % non-condensing.

Power supply

Two Li-ion batteries (14.4 V, 8 Ah); charging via 100–240 V AC adapter or 12 V vehicle input.

Battery life

Up to 16 hours continuous use or > 3 days in timed logging mode.

Dimensions

Console – 28 × 14.5 × 24 cm; Leaf chamber – 19 × 8 × 6 cm.

Weight

Console ≈ 4.8 kg (with batteries); chamber ≈ 0.7 kg.

Scope of supply

CIRAS-4 console, PLC4 leaf chamber, cables, 2 Li-ion batteries, charger, software and manual.

Certificates and compliance with standards

CE, ISO 9001, GLP, RoHS; manufactured by PP Systems (UK / USA).

Country of origin

United Kingdom

Storage conditions

Store in a dry environment at +5 to +40 °C; avoid dust and moisture.

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