TOP ELECTRONIC PRESSURE SENSOR FOR SMS TENSIOMETERS - SKM 850

What do I measure?

The total soil water suction in the tensiometer tube (also known as soil water potential or hydraulic charge)

APPLICATIONS

AGRICULTURE
Precise management of irrifations.
Management of adjusted water stress levels for seed production.
AGRONOMY / ENVT
Studies on water bulbs in soils.
Water stress management for modeling.
Checking water potential levels before starting a soil solution sampling campaign.
HYDROLOGY
Water potential measurements in unsaturated soils.
Soil water caracteristic curves.
Studies on water flows : percolation...
Studies on water ressources : refilling of the water table monitoring.
Water balance.

The SKM 850 pressure sensor is built for field use and has a 0 to -999 HPa (mbar) measuring range.

The SKM 850 sensor has its own temperature correction (-10°C /+50°C).

The sensor is light (85 grs) and small. You can easily take it with you to your field.

The SKM 850 sensor is compact, waterproof and is built for outdoor as well as indoor use.

The SKM 850 sensor will be strongly fixed to any tensiometer.

The SKM 850 sensor exists in two versions : diffrential voltage (ref. SHM 850T) or current loop output (SKM 850C2).

You can choose between ordering the sensor alone or fixed to a tensiometer (all lengths are possible).

Key Advantages

LOW PRICE
TEMPERATURE COMPENSATION
QUICK : immediate placing on any tensiometer tube
MONITORING by connection to a data logger

Disadvantages
Measurements more sensitive to temperature than with the SKT 850 model

TECHNICAL CHARACTERISTICS

Measuring range : 0 Hpa to -999 Hpa.
Accuracy : better than 1% of full scale.
Pressure sensor : differental pressure type with integrated temperature compensation.
Offset : factory calibrated (SKM 850C2 sensor only ; each sensor is delivered with an individual calibration certificate).
Measuring principle : by piercing the needle case on the upper part of the tensiometer. The case can be placed on any existing tensiometer (manufactured by SDEC France or any other manufacturer).
Also fixable : on a combined tensiometer & lysimeter tube, ref. TENSIONIC (let us know when ordering).
Fastening system : simply pushed on the top of the tensiometer tube (needle trough silicone stopper).
Output: On cable across nickel stuffing box.
Power supply : direct current; +6 to +15 Volts. Protection : the sensor is electronically protected against polarity reverse (SKM 850C2 model).
Temperature compensation : -10°C to +50°C.
Sensor case : Polycarbonate box (black colour).
Dimensions : Ø = 40 mm.
Weight : 85 grammes.
Operating temperature : -5°C à + 50°C.(with anti-freeze).
Storage temperature : -20°C à + 60°C.(without water inside sensor).