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    Submersible Depth Sensor | 4-20mA, 0-5V, 0-10V | Pa993

    Fully Submersible, Very Compact Ø23mm and Surge Protected
    Submersible Depth Sensor
    Lead Time
    2 weeks
    Prices From
    (excl. VAT)
    Quantity, OEM & educational discounts

    At a Glance

    • Ranges: 0-0.5mWG up to 0-100mWG
    • 23mm Diameter
    • Outputs: 4-20mA, 0-5V, 0-10V or 0.5-4.5V Ratiometric
    • Environmental Protection: IP68 to 100 metres
    • Accuracy: <±0.25%/FS (Optional 0.1% and 0.15% Versions)
    • Compact 23mm Diameter
    • High Accuracy with 16-Bit Microprocessor
    • Fully Submersible for Long-Term Immersion up to 100m 
    • High Integrity Waterproof Assembly
    • Robust Stainless Steel & Piezo-Resistive Silicon Sensing Element
    • Surge Protected from Lightning Strikes & Power Fluctuations


    Applied Measurements submersible depth sensor Pa993 is high accuracy, fully submersible and ideal to use in rivers, reservoirs, tanks and channels, submerged pipes and vessels, fountains, boreholes, pots and waters.  It has a slimline 23mm diameter body to suit most underwater pipes.

    It uses a state-of-the-art 16-bit microprocessor, embedded within its electronics, enabling it to carry out linearisation and temperature compensation to give you accurate readings to less than ±0.25% of full scale.  If you require higher accuracy, we can also offer this submersible depth sensor with an accuracy of 0.1% or 0.15%.

    Thanks to its selection of outputs including 4-20mA (2-wire), 0-5V (3-wire) and 0-10V (3-wire), we are confident that a suitable output can be found for your particular application.  Plus, if you are going to be using a data logger with the depth sensor, a ratiometric output of 0.5-4.5V from a 5V supply can also be offered.

    To ensure high integrity underwater, Applied Measurements submersible depth sensor is constructed from 316 Stainless Steel and has a moulded cable exit with vented polyurethane (PUR) cable (NBR and EPDM seals are optional) along with an internal strain wire.  Its IP68 protection rating ensures it can be used at depths of up to 100m in long term submersion in water.

    Applied Measurements can also provide a version compatible with seawater if required.  Plus, an internal temperature sensor for temperature and water level readings can be optionally provided.

    In addition, the Pa993 submersible depth sensor has a surge protection circuit built-in, which help to lower any effects of close lightning strikes and power supply fluctuations.

    If an SDI-12 output is required, please see our Applied Measurements Pa993D SDI-12 submersible depth sensor, which has an accuracy of <±0.15% of full scale as standard.

    Technical Specifications

    Pressure Ranges0.5, 1, 2.5, 5, 10, 20, 25, 50, 75, 100metres Water Gauge (mWG)
    Safe Overpressure150% Pressure Range
    Burst Pressure300
    Rated Output5-25mV/V typical4-20mA0-5Vdc0-10Vdc0.5-4.5Vdc ratiometric
    Wiring Configuration4-wire2-wire3-wire3-wire3-wire
    Supply Voltage2-108-3212-3212-325 (2.7 - 5.5)Volts DC
    Load Driving CapacityN/A1000N/AN/AN/AOhms at Max. Supply Voltage
    Electrical ConnectionsScreened polyurethane (PUR) cable with vent tube, strain and drain wire
    Accuracy<0.25 (0.1 or 0.15 optional)±% Pressure Range
    Temperature Range Operating-10 to +60 (non-freezing media only)˚C
    Temperature Range Compensated20±20˚C
    Temperature Effect on Output<0.015±%/˚C
    Temperature Effect on Zero<0.02 (0.01 optional)±%/rated output/˚C
    Environmental ProtectionIP68 to 100mWG (10bar) Moulded Cable Exit
    Weight270 approx. (excluding cable) / Cable = 48/metregrams
    Construction316L St/Steel, Viton + PUR (NBR + EPDM Seals optional)
    Electrical ProtectionEMC Immunity: EN50082-1 & Surge (Lightning) Protection: EN61000-4-5
    Supply Reverse Polarity ProtectionNo damage, but also no function

    Product Dimensions

    submersible depth sensor outline drawing

    Wiring Details

    Pa993 Wiring Diagram 4-20mA Output (2-wire)
    Red+ve supply
    Blue-ve supply & 4-20mA output in series
    Whiteto case
    Green/Yellowcable screen
    Pa993 Wiring Diagram 0.5-4.5Vdc, 0-5Vdc, 0-10Vdc Output (3-wire)
    Red+ve supply
    Blue-ve supply
    Yellow+ve signal
    Whiteto case
    Green/Yellowcable screen
    Pa993 Wiring Diagram mV/V Output (4-wire)
    Red+ve excitation
    Blue-ve excitation
    White+ve signal
    Yellow-ve signal
    Green/Yellowcable screen

    Ordering Codes & Options

    Pa9931-10mWG-A2AAV-01-000 (example code)Pa9931-10mWG-A2AAV-01-000
    Product Family
    Electrical Output
    0 = mV/V0
    1 = 4-20mA (2-wire)1
    2 = 0-5Vdc (3-wire)2
    3 = 0-10Vdc (3-wire)3
    4 = 0.5-4.5Vdc Ratiometric (3-wire)4
    Pressure Range
    10mWG = 0 to 10 metres of water gauge (H2O)-10mWG
    10mWA = 0 to 10 metres of water absolute (H2O)-10mWA
    10mWSG = 0 to 10 metres of water sealed gauge (H2O)-10mWSG
    Accuracy (Non-Linearity & Hysteresis)
    A = <±0.25%/FS-A
    B = <±0.1%/FS-B
    C = <±0.15%/FS-C
    Zero Temperature Compensation (TZS)
    2 = <±0.02%/FS/ºC2
    1 = <±0.01%/FS/ºC1
    Process Connection
    A = Nose ConeA
    B = G¼” MaleB
    Housing Material
    A = 316 Stainless SteelA
    O-Ring Material
    V = Viton (FKM)V
    N = Nitrile (NBR)N
    Cable Length (in metres)
    01 = 1 metre-01
    10 = 10 metres-10
    Specials Code
    000 = No Special Requirements-000

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