by
The Leading Enterprise Internet of Things Solution
Wireless
Differential Pressure Sensors
General Description
The ALTA wireless differential pressure sensor
measures the pressure difference between two input
ports and transmits the measurement to iMonnit.
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Measurement range: -500 Pa to 500 Pa
•
Calibrated and temperature compensated
Features of Monnit ALTA Sensors
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•
•
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Wireless range of 1,200+ feet through 12+ walls *
Frequency-Hopping Spread Spectrum (FHSS)
Improved interference immunity
Improved power management for longer battery life **
(12+ years on AA batteries)
Encrypt-RF® Security (Diffie-Hellman Key Exchange
+ AES-128 CBC for sensor data messages)
Onboard data memory stores up to 512 readings
per sensor:
- 10-minute heartbeats = 3.5 days
- 2-hour heartbeats = 42 days
Over-the-air updates (future proof)
Free iMonnit basic online wireless sensor monitoring
and notification system to configure sensors, view
data and set alerts via SMS text and email
Principle of Operation
The differential pressure sensor measures the pressure
difference between two ports. When viewing the
sensor from the top, the right inlet port is the positive
or high side pressure input. When the pressure on this
port is greater than the left port the sensor produces
a negative pressure reading. When the pressure is
greater on the left port the sensor produces a positive
pressure reading.
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•
*
Actual range may vary depending on environment.
**
Battery life is determined by sensor reporting
frequency and other variables. Other power options
are also available.
Example Applications
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Building/Room Pressure
Air Flow
Variable Air Volume Filter Status
Duct Pressure
Clean Rooms
Hospitals
Fume Hoods
Computer Rooms
Many additional applications
Wireless Range Comparison
Wireless Range Comparison
Monnit ALTA
Monnit
Other Wireless Platforms
Wifi
Bluetooth
PAGE 1
3.876
2.110
www.monnit.com
© 2018 Monnit Corp.
LONG RANGE WIRELESS
DIFFERENTIAL AIR
PRESSURE SENSOR
3.110
1.495
ALTA Differential Pressure Sensor | Technical Specifications
Supply voltage
Current consumption
Operating temperature range (commercial version) **
Pressure range
Allowable overpressure
Rated burst pressure
Max humidity for long-term exposure
Accuracy
Span repeatability
Span shift due to temperature variation
Offset stability
Calibrated for
Media compatibility
Temperature measurement range
Calibrated temperature measurement range
Temperature resolution
Temperature accuracy
Temperature repeatability
Integrated memory
Wireless range
Wireless operation
Security
Weight
Certifications
Industry
Canada
2.7–3.8 VDC (3.0–3.8 VDC using power supply) *
0.2 µA (sleep mode), 0.7 µA (RTC sleep), 570 µA (MCU idle), 2.5 mA
(MCU active), 5.5 mA (radio RX mode), 22.6 mA (radio TX mode)
-18°C to 55°C (0°F to 130°F) with Alkaline Batteries
-40°C to 85°C (-40°F to 185°F) with Lithium Battery
-500 Pa to 500 Pa
100 kPa
500 kPa
40°C dew point
3% of reading +/- 0.1 Pa
0.5% of reading
< 0.5% of reading per 10°C
< 0.05 Pa/year
Air, N2
Air, N2, O2, non-condensing
-40°C to 85°C (-40°F to +185°F)
-20°C to 85°C (-4°F to +185°F)
0.1°C
+/- 2°C (-10°C to +60°C)
+/- 3°C (-40°C to +85°C)
+/- 0.1°C
Up to 512 sensor messages
1,200+ ft non-line-of-sight
900 MHz—Frequency-Hopping Spread Spectrum
868 MHz and 433 MHz—Frequency-Agile Wireless
Encrypt-RF® (256-bit key exchange and AES-128 CTR)
3.7 ounces
900 MHz product; FCC ID: ZTL-G2SC1 and IC: 9794A-G2SC1. 868
and 433 MHz product tested and found to comply with: EN 300 220-
2 V3.1.1 (2017-02), EN 300 220-2 V3.1.1 (2017-02) and EN 60950
*
Hardware cannot withstand negative voltage. Please take care when connecting a power device.
**
At temperatures above 100°C, it is possible for the board circuitry to lose programmed memory.
PAGE 2
4.528 in
(139.700 mm)
7.07 in
(179.603 mm)
ALTA Industrial Wireless Differential Pressure Sensor | Technical Specifications
Supply voltage
Current consumption
Operating temperature range (board circuitry and battery)
Included battery
Optional solar feature
Max temperature range
Capacity
Solar panel
Charging temperature range
Max temperature range
Included rechargeable battery
Solar efficiency
Pressure range
Allowable overpressure
Rated burst pressure
Max humidity for long-term exposure
Accuracy
Span repeatability
Span shift due to temperature variation
Offset stability
Calibrated for
Media compatibility
Temperature measurement range
Calibrated temperature measurement range
Temperature resolution
Temperature accuracy
Temperature repeatability
Integrated memory
Wireless range
Security
Weight
Enclosure rating
UL rating
Certifications
Industry
Canada
2.7–3.8 VDC (3.0–3.8 VDC using power supply) *
0.2 µA (sleep mode), 0.7 µA (RTC sleep), 570 µA (MCU idle), 2.5 mA
(MCU active), 5.5 mA (radio RX mode), 22.6 mA (radio TX mode)
-40°C to +85°C (-40°F to +185°F) **
-40° to +85°C (-40° to +185°F)
1800 mAh
5VDC/30mA (53mm x 30mm)
0° to 45°C (32° to 113°F)
-20° to 60°C (-4° to 140°F)
600 mAh/>2000 charge cycles (80% of initial capacity)
Optimized for high and low-light operation ***
-500 Pa to 500 Pa
100 kPa
500 kPa
40°C dew point
3% of reading +/- 0.1 Pa
0.5% of reading
< 0.5% of reading per 10°C
< 0.05 Pa/year
Air, N2
Air, N2, O2, non-condensing
-40°C to 85°C (-40°F to +185°F)
0.1°C
0.1°C
+/- 2°C (-10°C to +60°C)
+/- 3°C (-40°C to +85°C)
+/- 0.1°C
Up to 512 sensor messages
1,200+ ft non-line-of-sight
Encrypt-RF® (256-bit key exchange and AES-128 CTR)
4.7 ounces
NEMA 1, 2, 4, 4x, 12 and 13 rated, sealed and weather proof
UL Listed to UL508-4x specifications (File E194432)
900 MHz product; FCC ID: ZTL-G2SC1 and IC: 9794A-G2SC1. 868 and
433 MHz product tested and found to comply with: EN 300 220-2 V3.1.1
(2017-02), EN 300 220-2 V3.1.1 (2017-02) and EN 60950
*
Hardware cannot withstand negative voltage. Please take care when connecting a power device.
**
At temperatures above 100°C, it is possible for the board circuitry to lose programmed memory.
PAGE 2
1.579 in
(41.300 mm)
2.559 in
(90.678 mm)
Note
Do not connect any tubing to the pressure ports without the sensor lid securely
installed. The lid helps the keep sensor in place and stabilizes and supports the
pressure ports.
Pressurizing the positive side will produce a positive reading. Pressurizing the
negative side will produce a negative reading.
Top
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Bottom
Commercial Grade Sensors
Monnit commercial grade sensors are designed for applications in ordinary environments (normal room temperature,
humidity and atmospheric pressure). Do not use these sensors under the following conditions as these factors can
deteriorate the product characteristics and cause failures and burn-out.
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Corrosive gas or deoxidizing gas: chlorine gas, hydrogen sulfide gas, ammonia gas, sulfuric acid gas, nitric oxides
gas, etc.
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Volatile or flammable gas
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Dusty conditions
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Low-pressure or high-pressure environments
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Wet or excessively humid locations
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Places with salt water, oils chemical liquids or organic solvents
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Where there are excessively strong vibrations
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Other places where similar hazardous conditions exist
Use these products within the specified temperature range. Higher temperature may cause deterioration of the
characteristics or the material quality.
Industrial Grade Sensors | Type 1, 2, 4, 4X, 12 and 13 NEMA Rated Enclosure
Monnit’s Industrial sensors are enclosed in reliable, weatherproof NEMA-rated enclosures. Our NEMA-rated enclosures
are constructed for both indoor or outdoor use and protect the sensor circuitry against the ingress of solid foreign objects
like dust as well as the damaging effects of water (rain, sleet, snow, splashing water, and hose-directed water).
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Safe from falling dirt
Protects against wind-blown dust
Protects against rain, sleet, snow, splashing water, and hose-directed water
Increased level of corrosion resistance
Will remain undamaged by ice formation on the enclosure
For more information about our products or to place an order, please contact
our sales department at 801-561-5555.
Visit us on the web at
www.monnit.com.
Monnit Corporation
3400 South West Temple
Salt Lake City, UT 84115
801-561-5555
www.monnit.com
Monnit, iMonnit, ALTA, PinchPower, Encrypt-RF and all other trademarks are property of Monnit, Corp.
© 2018 Monnit Corp. All Rights Reserved.
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