Sauermann Si-PM3 Wireless Differential Pressure Manometer
Supported models: Si-PM3
- Bluetooth
- Differential Pressure
- Pressure
- Static Pressure
- Direct Connect
Palm-sized wireless differential pressure manometer (+/- 150 hPa) for static and differential pressure, running on the separate Si-HVACR Measurement app.
The Sauermann Si-PM3 is a palm-sized digital differential pressure manometer for HVAC/R applications. It measures static and differential pressure from -150 to +150 hPa (-60 to 60 inH2O) with a piezoresistive sensor and, with an optional Pitot tube, derives air velocity and airflow. It has a backlit 2-line LCD, magnetic backing, and up to 170 hours of battery life. Note that the Si-PM3 connects wirelessly to the separate Si-HVACR Measurement mobile app at up to 15 m (98 ft) range, which is a different app and ecosystem from the Sauermann Pilot refrigerant-manifold line that the Si-RM450, Si-RT7, Si-RP4, and Si-TH4 use; it is a standalone manometer, not a manifold probe.
Specifications
| Specification | Value |
|---|---|
| Pressure measuring range | -150 to +150 hPa (-60 to 60 inH2O) |
| Pressure accuracy | +/- (1.5% of value + 0.2 hPa) |
| Pressure resolution | 0.01 hPa / 0.001 psi / 1 Pa |
| Admissible overpressure | 750 mbar (301 inH2O) |
| Air velocity range (Pitot, app, calculated) | 2 to 80 m/s (394 to 15748 fpm) |
| Airflow range (Pitot, app, calculated) | 0 to 9999 m3/h |
| Measuring element | Piezoresistive sensor |
| Display | 2-line LCD 7-segment monochrome with backlight |
| Power supply | 3x LR03 AAA 1.5 V alkaline |
| Battery life | 170 h @ 20 C (without backlight/wireless) |
| Auto shut-off | 10 minutes (can be deactivated) |
| Wireless frequency | 2402 to 2480 MHz, 0 dBm |
| Wireless range | Up to 15 m (98 ft) |
| App compatibility | Android 5.0, iOS 12.4, BLE 4.0 (Si-HVACR Measurement app) |
| IP rating | IP40 |
| Dimensions | 70 x 33 x 141 mm (2.76 in x 1.3 in x 5.55 in) |
| Weight (with batteries) | 200 g (7 oz) |
Product line
Probes
Sauermann's wireless Si refrigeration probes for temperature, pressure, humidity, and static pressure measurement.
View the full Probes line →-
Sauermann Si-RP4 Wireless Pressure Probe
Wireless high/low pressure probe for AC, refrigeration, and heat pumps, A1/A2L/A3 compatible, connecting to the Si-RM350/Si-RM450 manifolds and Sauermann Pilot app.
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Sauermann Si-RT7 Wireless Temperature Clamp
Wireless pipe temperature clamp for superheat and subcooling, fitting pipes 6 to 42 mm and connecting to the Si-RM350/Si-RM450 manifolds and Sauermann Pilot app.
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Sauermann Si-TH4 Wireless Psychrometer
Wireless psychrometer measuring temperature and humidity with dry/wet bulb calculation, connecting to the Si-RM350/Si-RM450 manifolds and Sauermann Pilot app.
Alternatives
Tools with similar capabilities that also work with measureQuick.
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TEC Digital Pressure Gauge
High-precision digital pressure gauge featuring 0.9% accuracy and Bluetooth connectivity - ideal for building pressure measurements and HVAC system diagnostics.
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UEi DPM Wireless Differential Pressure Manometer
Compact wireless differential pressure manometer with dual port design. Measure positive, negative, or differential pressure with Bluetooth streaming to measureQuick. UEi DPM compatible.
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CPS Static Pressure Meter
Professional wireless static pressure kit with 0.004 inWC resolution and comprehensive app integration for accurate HVAC/R pressure diagnostics and reporting.