SF-4P

SF-5P
Sap Flow sensors

Overview

The SF-4P and SF-5P sensors are designed for monitoring relative variations of sap flow rate in a leaf petiole or small shoot.

The sensor’s probe is made as a hollow collapsible heat-insulating cylinder. A heater and a pair of bead thermistors are located inside the cylinder.

A signal conditioner provides powering of the heater and conditioning of the output signal.

The probe is connected by a standard 1-meter cable to the waterproof box with the signal conditioner inside.

Standard output cable length between signal conditioner and monitor is 4 meters.

	SF-4P	SF-5P
Measurement range	Not specified¹
Accuracy	Not specified
Suitable stem diameter, mm	1 to 5	4 to 10
Overall dimensions of the sensor, mm	30 × 30 × 40	30 × 35 × 40
Cable length between probe and signal conditioner	1 m
Output cable length	4 m

Approximate range of 12 ml/h was determined on a stem simulator – a fiber-filled PVC hose with 5 mm in diameter.