All Categories
    Menu Close

    Digital Differential Pressure Manometer, ±689kPA

    SISCO digital pressure manometer uses an imported pressure sensor, a high-precision ADC, and a low-power MCU, designed as a professional high-precision, high-range, high-resolution digital differential pressure gauge with a large screen display and indoor temperature measurement.
    i h
    🚚 Free shipping
    🔙 30-day returns
    📅 Delivery: 7-12 days

    The ±689 kPA digital differential pressure manometer, with a rapid 0.5-second response time. This manometer can quickly measure the current detected pressure value (relative to the current atmospheric pressure) through a single channel, and it can simultaneously detect the pressure difference between two measurement ports through dual channels (P1 and P2).

    Digital manometer details

    High-Efficiency Recording

    • The two modes of Differential Mode and Recording Mode enhance the professionalism of measurement and recording.
    • High-precision hose probe, can quickly measure the current detected pressure value (relative to the current atmospheric pressure) through a single channel. The dual channels can simultaneously detect the pressure difference between two measurement ports.
    Digital manometer charge details

    Micro-USB Power Supply Solution 

    • DC solution, automatically identifies and matches equipment current power supply does not hurt the manometer.
    • Two power modes available: dry battery / lithium battery.
    Digital manometer selectable unit

    11 Pressure Unit Conversions

    • Large backlit display, suitable for various scenarios.
    • Achieve direct data output without the need for further conversion.
    • Flexible choose Psi, kg/cm², oz/in², bar, mbar, kPa, inHg, mmHg, inH2O, ftH2O, cmH2O.


    SISCO differential pressure manometer tester is widely used for measuring pressure in fans and blowers, filter resistance, air velocity, furnace pressure, orifice differential pressure, etc. Also utilized for air-fuel ratio control and automatic valve control during combustion processes, as well as for monitoring blood pressure and respiratory pressure in healthcare equipment.

    Digital manometer for electricity


    Digital manometer for filter


    Digital manometer for pipeline


    Digital manometer for chemical




    Model SISCO-DPM-M169
    Sensor Type Ion-implanted X-type silicon pressure sensor
    Measurement Units Psi, kg/cm², oz/in², bar, mbar, kPa, Pa, inHg, mmHg, inH2O, ftH2O, cmH2O
    Measurement Range ± 689 kPa =  ±100 Psi
    Accuracy ± 0.3% FSO (25℃)
    Repeatability ± 0.2% (MAX ± 0.5% FSO)
    Linearity/Hysteresis ± 0.29% FSO
    Measurement Rate 0.5 seconds
    Data Storage 100 sets
    Temperature Measurement Range 32-122°F (0-50℃)
    Temperature Accuracy ± 5℃
    Temperature Resolution 0.1℃
    Max Pressure ± 150 Psi
    Low Battery Indicator ≤ 6.8V display
    Power Supply USB 5V + 9V/6F22
    Auto Shut-off Approximately 15 minutes of inactivity
    Operating Voltage 9V
    Charging Time None
    Display for Exceeding Positive/Negative Pressure Range Err0
    Display for Exceeding Negative Pressure Range Err1
    Net Weight 300g

    Range and Resolution

    Unit Range Resolution
    kPa ± 20.68 0.001
    psi ± 2.999 0.001
    kg/cm² ± 0.210 0.001
    oz/in² ± 47.99 0.01
    Bar ± 0.206 0.001
    mbar ± 206.8 0.1
    inHg ± 6.106 0.001
    mmHg ± 151.1 0.1
    inH2O ± 83.02 0.01
    ftH2O ± 6.918 0.001
    cmH2O ± 210.8 0.1


    689 kpa digital manometer button details

    Packing List

    • 1 x Manometer
    • 1 x Box
    • 1 x Specification
    • 1 x Protective case
    • 1 x USB cable
    • 1 x Battery
    • 2 x Soft tube

    689 kpa digital manometer packing list


    Q1: What is the function of digital differential pressure manometer?
    A1: The function of a digital differential pressure manometer is to measure the pressure of a fluid, typically in a closed system. It can be used to monitor and control pressure levels in various applications, such as in industrial processes, HVAC systems, and medical equipment. Manometers are designed to provide accurate and precise pressure readings, allowing for proper maintenance and troubleshooting of systems.

    Q2: What is the sensitivity of a digital pressure manometer?
    A2: The sensitivity of a digital pressure manometer refers to its ability to detect small changes in pressure. It's typically measured in terms of the amount of deflection or movement of the manometer fluid (e.g., liquid column) in response to a change in pressure.

    A highly sensitive manometer will show noticeable deflection even with small changes in pressure, while a less sensitive one will require larger pressure changes to produce the same deflection. Sensitivity is influenced by factors such as the diameter of the tubing, the density of the manometer fluid, and the scale markings on the manometer.

    Q3: Why is mercury used in a manometer instead of water?
    A3: Mercury is used in manometers instead of water due to its higher density, which allows for more accurate measurements of higher pressures. Additionally, mercury's incompressibility and temperature stability make it suitable for various environmental conditions. However, mercury's toxicity has led to increasing concerns, prompting the exploration of alternative fluids in manometers, especially in applications prioritizing safety and environmental protection.

    Tips: How does a manometer work?

    The working principle of a manometer is based on the displacement of a liquid when subjected to pressure. Typically consisting of a sealed U-shaped or straight tube filled with liquid (such as water or mercury), a manometer operates by measuring the displacement of the liquid column in response to the applied pressure.

    The magnitude of the pressure is determined by measuring the height difference of the liquid column. Usually, a reference point (such as atmospheric pressure) is used as the zero point of pressure, and the change in height of the liquid column under the applied pressure relative to this reference point is measured.

    Specifically, when the pressure being measured is applied to one side of the manometer, the liquid in the tube moves, causing the liquid level on that side to rise while the level on the other side falls. By measuring the difference in height between the two liquid levels, the pressure can be determined.

    The working principle of a manometer may vary depending on its type and application, but the basic principle involves using the displacement of a liquid under pressure to measure pressure.


    Thank you for buying industrial test and measurement equipment on, all products sold by SISCO and the partner cover a 12 months warranty, effective from the date of receiving the products.

    What is covered?

    SISCO is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.

    What is not covered?

    • Product purchased from anyone other than a SISCO store or a SISCO authorized reseller.
    • Expendable parts.
    • Routine cleaning or normal cosmetic and mechanical wear.
    • Damage from misuse, abuse or neglect.
    • Damage from use of parts other than SISCO approved.
    • Damage from use outside the product’s usage or storage parameters.
    • Damage from use of parts not sold by SISCO.
    • Damage from modification or incorporation into other products.
    • Damage from repair or replacement of warranted parts by a service provider other than a SISCO authorized service provider.
    • Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
    5.0 1
    Write your own review Close
    Daniel | 6/14/2024 12:39 AM
    Works as intended!!
    Nice differential pressure measurement instrument with 11 pressure unit, without the need for further conversion,i bought it for my college works, very accurate.Good product.