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Pressure Sensors
NSB-ZPS-T

Differential Pressure Switch

NSB-ZPS-SW2 (0.40" to 1.40" W.C. (100 Pa to 350 Pa))
NSB-ZPS-SW3 (1.20" to 2.40" W.C. (300 Pa to 600 Pa))
NSB-ZPS-SW4 (2.40" to 6.42" W.C. (600 Pa to 1600 Pa))

The Differential Pressure Switch is ideal for air filter monitoring, static pressure proving, airflow proving, or auxiliary fan actuation. Because of its UL 353 Limit Control Listing, the pressure switch can be used in safety circuits to protect heating appliances, heating systems, processing systems and HVAC/R systems.

Compact Pressure Sensors
Compact Pressure Sensor

NSB-ZPS-SR-EZ-ST-IN (inches)
NSB-ZPS-SR-EZ-ST-PA (pascals)

Compact Low Pressure Sensor

NSB-ZPS-LR-EZ-ST-IN (inches)
NSB-ZPS-LR-EZ-ST-PA (pascals)

The Compact Pressure Sensor is a true differential pressure transmitter that provides ±5 inches W.C. (±1,250 Pacals) in 10 field selectable ranges. The Compact Low Pressure Sensor is also a true differential pressure transmitter that provides ±1 inches WC (±250 Pacals) in 10 field selectable ranges. The enclosure is designed for DIN rail, Snaptrack or surface mounting. Three output ranges of 0 to 5 VDC, 0 to 10 VDC, and 4 to 20 mA are also field-selectable for all pressure ranges. The wiring terminal block is depluggable. Pressure units include a static pressure probe assembly and are available in Inches of Water Column or Pascals.

Pressure Sensors

NSB-ZPS-LR-BB-ST-D-IN (low pressure)
NSB-ZPS-SR-BB-ST-D-IN

The Low Pressure Sensor & Pressure Sensor with LCD display measures building pressure, air velocities and volumes. The heart of the unit is a micro-machined silicon pressure sensor. The unit includes a static pressure probe assembly.

Zone Pressure Multi-Sensor

NSB-ZPM-HR-ST-D (high range)
NSB-ZPM-SR-ST-D (standard range)
NSB-ZPM-LR-ST-D (low range)

The Zone Pressure Multi-Sensor is the most flexible pressure sensor on the market. Output, range, units, directionality, and response time are quickly set in the field with no tools, no power, and no small components.

  Differential Pressure Switch
Pressure Range NSB-ZPS-SW2: 0.40" to 1.40" W.C. (100 Pa to 350 Pa)
NSB-ZPS-SW3: 1.20" to 2.40" W.C. (300 Pa to 600 Pa)
NSB-ZPS-SW4: 2.40" to 6.42" W.C. (600 Pa to 1600 Pa)
Pressure Ports ¼ brass
Proof Pressure 100” W.C. (3.6 PSI, 24,900 Pa)
Switch Type SPDT (Silver Contacts)
Contact Rating (UL 353)
28 VA pilot duty, 24 VAC
1/10 hp, 120-277 VAC
125 VA pilot duty, 125 VAC
2.5 A inductive, 125 VAC
5 A resistive, 125 VAC
Contact Material Silver
Operating Temperature -40°F to 185°F (-40°C to 85°C)
Operating Humidity 5 to 95% RH non-condensing
Measurement Media Air or Combustion Gases
  Compact Pressure Sensor Compact Low Pressure Sensor
Power 7 to 40 VDC (4 to 20 mA Output)
7 to 40 VDC or 18 to 28 VAC (0 to 5 VDC Output)
13 to 40 VDC or 18 to 28 VAC (0 to 10 VDC Output)
Power Consumption 20 mA max, DC only at 4 to 20 mA Output
4.9 mA max DC at 0 to 5 VDC or 0 to 10 VDC Output
0.12 VA max AC at 0 to 5 VDC or 0 to 10 VDC Output
Load Resistance 4 to 20 mA Output 850 Ω Maximum @ 24 VDC
0 to 5 VDC or 0 to 10 VDC output 1KΩ minimum
Accuracy at 72°F ±0.25% of range ±0.5% of range 0 to 0.1”, 0 to 0.25”, ±0.1” and ±0.25” ranges
±0.5% of range 0 to 30 Pa, 0 to 50 Pa, ±30 Pa and ±50 Pa ranges
±0.25% of range all other ranges
Stability ±0.25% F.S. per year
Temperature Error 0.01% FS/°F (0.02% FS/°C) (±5.0” W.C. @ -4 to 140°F [-20 to 60°C]) 0.04% FS/°F (0.07% FS/°C) (±1.0” W.C. @ -4 to 140°F [-20 to 60°C])
Environmental Operation Range 14 to 140°F (-10 to 60°C)
Storage Temperature -40 to 203°F (-40 to 95°C)
Overpressure Proof: 27.68” W.C. (1 PSI)
Burst: 41.52” W.C. (1.5 PSI)
Wiring* 3-wire removable terminal block (14 to 24 AWG)
2 wires (4 to 20mA Current loop)
3 wires (AC or DC powered, Voltage out)
Humidity 0 to 95% RH, non-condensing
Port Connection 1 High Pressure and 1 Low Pressure for push-on 1/4-inch tubing (1/8” to 3/16” I.D.)
Enclosure Material ABS Plastic, UL94, V-0
Mounting DIN Rail, Snaptrack or Surface Mountable

*We recommend that you do not run wiring for the pressure transmitter in the same conduit as line voltage wiring or with wiring used to supply highly inductive loads such as motor, generators, and coils.

  Pressure Sensor Low Pressure Sensor
Power 7 to 40 VDC (4 to 20 mA Output)
7 to 40 VDC or 18 to 28 VAC (0 to 5 VDC Output)
13 to 40 VDC or 18 to 28 VAC (0 to 10 VDC Output)
Power Consumption 20 mA max, DC only at 4 to 20 mA Output
4.9 mA max DC at 0 to 5 VDC or 0 to 10 VDC Output
0.12 VA max AC at 0 to 5 VDC or 0 to 10 VDC Output
Load Resistance 4 to 20 mA Output 850 Ω Maximum @ 24 VDC
0 to 5 VDC or 0 to 10 VDC output 1KΩ minimum
Accuracy at 72°F ±0.25% of range ±0.5% of range 0 to 0.1”, 0 to 0.25”, ±0.1” and ±0.25” ranges
±0.25% of range all other ranges
Stability ±0.25% F.S. per year
Temperature Error 0.01% FS/°F (0.02% FS/°C) (±5.0” W.C. @ -4 to 140°F [-20 to 60°C]) 0.04% FS/°F (0.07% FS/°C) (±1.0” W.C. @ -4 to 140°F [-20 to 60°C])
Environmental Operation Range 14 to 140°F (-10 to 60°C)
Storage Temperature -40 to 203°F (-40 to 95°C)
Overpressure Proof: 27.68” W.C. (1 PSI)
Burst: 41.52” W.C. (1.5 PSI)
Wiring* 2 wires (4 to 20mA Current loop)
3 wires (AC or DC powered, Voltage out)
Humidity 0 to 95% RH, non-condensing
Port Connection 1 High Pressure and 1 Low Pressure for push-on 1/4-inch tubing (1/8” to 3/16” I.D.)
Enclosure Material UV-resistant Polycarbonate, UL94, V-0
Enclosure Rating IP66, NEMA 4
Mounting Four external tabs with holes for #10 screws

*We recommend that you do not run wiring for the pressure transmitter in the same conduit as line voltage wiring or with wiring used to supply highly inductive loads such as motor, generators, and coils.

  High Range Zone Standard Range Zone Low Range Zone
Power 7 to 40 VDC for 4 to 20 mA Output
7 to 40 VDC or 18 to 32 VAC for 0 to 5 or 1 to 5 V Output
13 to 40 VDC or 18 to 32 VAC for 0 to 10 or 2 to 10 V Output
Power Consumption 20 mA max, DC only at 4 to 20 mA Output
4.9 mA max DC at 0 to 5 VDC or 0 to 10 VDC Output
0.12 VA max AC at 0 to 5 VDC or 0 to 10 VDC Output
Load Resistance 4 to 20 mA Output 850 Ω Maximum @ 24 VDC
0 to 5 V or 0 to 10 V output 6K to 10KΩ minimum
Accuracy at 72°F ±0.25% on all ranges ±0.25% of range ±0.5% of range for the three lowest unidirectional & bidirectional ranges, ±0.25% of range all other ranges
Stability ±0.25% F.S. per year
Port Size 1/4” tubing (1/8” to 3/16” I.D.)
Temperature Error 0.015% FS/°F (0.025% FS/°C) (0 to 30” W.C @-4 to 140°F (-20 to 60°C) 0.01% FS/°F (0.02% FS/°C) (±1.0” W.C @-4 to 140°F (-20 to 60°C) 0.04% FS/°F (0.07% FS/°C) (±1.0” W.C @-4 to 140°F (-20 to 60°C)
Environmental Operation Range -4 to 140°F (-20 to 60°C)
Storage Temperature -40 to 203°F (-40 to 95°C)
Overpressure Proof: 300.1 WC (10.83 PSI)
Burst: 512.6 WC (18.5 PSI)
Wiring* 2 wires (4 to 20mA Current loop)
3 wires (AC or DC powered, Voltage out)
Humidity 0 to 95% RH, non-condensing
Port Size 1/4” tubing (1/8” to 3/16” I.D.)
Enclosure Material UV-resistant Polycarbonate, UL94, V-0
Enclosure Rating IP44, NEMA 2

*We recommend that you do not run wiring for the pressure transmitter in the same conduit as line voltage wiring or with wiring used to supply highly inductive loads such as motor, generators, and coils.

  Differential Pressure Switch
Pressure Range NSB-ZPS-SW2: 0.40" to 1.40" W.C. (100 Pa to 350 Pa)
NSB-ZPS-SW3: 1.20" to 2.40" W.C. (300 Pa to 600 Pa)
NSB-ZPS-SW4: 2.40" to 6.42" W.C. (600 Pa to 1600 Pa)
Pressure Ports ¼ brass
Proof Pressure 100” W.C. (3.6 PSI, 24,900 Pa)
Switch Type SPDT (Silver Contacts)
Contact Rating (UL 353)
28 VA pilot duty, 24 VAC
1/10 hp, 120-277 VAC
125 VA pilot duty, 125 VAC
2.5 A inductive, 125 VAC
5 A resistive, 125 VAC
Contact Material Silver
Operating Temperature -40°F to 185°F (-40°C to 85°C)
Operating Humidity 5 to 95% RH non-condensing
Measurement Media Air or Combustion Gases
  Compact Pressure Sensor Compact Low Pressure Sensor
Power 7 to 40 VDC (4 to 20 mA Output)
7 to 40 VDC or 18 to 28 VAC (0 to 5 VDC Output)
13 to 40 VDC or 18 to 28 VAC (0 to 10 VDC Output)
Power Consumption 20 mA max, DC only at 4 to 20 mA Output
4.9 mA max DC at 0 to 5 VDC or 0 to 10 VDC Output
0.12 VA max AC at 0 to 5 VDC or 0 to 10 VDC Output
Load Resistance 4 to 20 mA Output 850 Ω Maximum @ 24 VDC
0 to 5 VDC or 0 to 10 VDC output 1KΩ minimum
Accuracy at 72°F ±0.25% of range ±0.5% of range 0 to 0.1”, 0 to 0.25”, ±0.1” and ±0.25” ranges
±0.5% of range 0 to 30 Pa, 0 to 50 Pa, ±30 Pa and ±50 Pa ranges
±0.25% of range all other ranges
Stability ±0.25% F.S. per year
Temperature Error 0.01% FS/°F (0.02% FS/°C) (±5.0” W.C. @ -4 to 140°F [-20 to 60°C]) 0.04% FS/°F (0.07% FS/°C) (±1.0” W.C. @ -4 to 140°F [-20 to 60°C])
Environmental Operation Range 14 to 140°F (-10 to 60°C)
Storage Temperature -40 to 203°F (-40 to 95°C)
Overpressure Proof: 27.68” W.C. (1 PSI)
Burst: 41.52” W.C. (1.5 PSI)
Wiring* 3-wire removable terminal block (14 to 24 AWG)
2 wires (4 to 20mA Current loop)
3 wires (AC or DC powered, Voltage out)
Humidity 0 to 95% RH, non-condensing
Port Connection 1 High Pressure and 1 Low Pressure for push-on 1/4-inch tubing (1/8” to 3/16” I.D.)
Enclosure Material ABS Plastic, UL94, V-0
Mounting DIN Rail, Snaptrack or Surface Mountable

*We recommend that you do not run wiring for the pressure transmitter in the same conduit as line voltage wiring or with wiring used to supply highly inductive loads such as motor, generators, and coils.

  Pressure Sensor Low Pressure Sensor
Power 7 to 40 VDC (4 to 20 mA Output)
7 to 40 VDC or 18 to 28 VAC (0 to 5 VDC Output)
13 to 40 VDC or 18 to 28 VAC (0 to 10 VDC Output)
Power Consumption 20 mA max, DC only at 4 to 20 mA Output
4.9 mA max DC at 0 to 5 VDC or 0 to 10 VDC Output
0.12 VA max AC at 0 to 5 VDC or 0 to 10 VDC Output
Load Resistance 4 to 20 mA Output 850 Ω Maximum @ 24 VDC
0 to 5 VDC or 0 to 10 VDC output 1KΩ minimum
Accuracy at 72°F ±0.25% of range ±0.5% of range 0 to 0.1”, 0 to 0.25”, ±0.1” and ±0.25” ranges
±0.25% of range all other ranges
Stability ±0.25% F.S. per year
Temperature Error 0.01% FS/°F (0.02% FS/°C) (±5.0” W.C. @ -4 to 140°F [-20 to 60°C]) 0.04% FS/°F (0.07% FS/°C) (±1.0” W.C. @ -4 to 140°F [-20 to 60°C])
Environmental Operation Range 14 to 140°F (-10 to 60°C)
Storage Temperature -40 to 203°F (-40 to 95°C)
Overpressure Proof: 27.68” W.C. (1 PSI)
Burst: 41.52” W.C. (1.5 PSI)
Wiring* 2 wires (4 to 20mA Current loop)
3 wires (AC or DC powered, Voltage out)
Humidity 0 to 95% RH, non-condensing
Port Connection 1 High Pressure and 1 Low Pressure for push-on 1/4-inch tubing (1/8” to 3/16” I.D.)
Enclosure Material UV-resistant Polycarbonate, UL94, V-0
Enclosure Rating IP66, NEMA 4
Mounting Four external tabs with holes for #10 screws

*We recommend that you do not run wiring for the pressure transmitter in the same conduit as line voltage wiring or with wiring used to supply highly inductive loads such as motor, generators, and coils.

  High Range Zone Standard Range Zone Low Range Zone
Power 7 to 40 VDC for 4 to 20 mA Output
7 to 40 VDC or 18 to 32 VAC for 0 to 5 or 1 to 5 V Output
13 to 40 VDC or 18 to 32 VAC for 0 to 10 or 2 to 10 V Output
Power Consumption 20 mA max, DC only at 4 to 20 mA Output
4.9 mA max DC at 0 to 5 VDC or 0 to 10 VDC Output
0.12 VA max AC at 0 to 5 VDC or 0 to 10 VDC Output
Load Resistance 4 to 20 mA Output 850 Ω Maximum @ 24 VDC
0 to 5 V or 0 to 10 V output 6K to 10KΩ minimum
Accuracy at 72°F ±0.25% on all ranges ±0.25% of range ±0.5% of range for the three lowest unidirectional & bidirectional ranges, ±0.25% of range all other ranges
Stability ±0.25% F.S. per year
Port Size 1/4” tubing (1/8” to 3/16” I.D.)
Temperature Error 0.015% FS/°F (0.025% FS/°C) (0 to 30” W.C @-4 to 140°F (-20 to 60°C) 0.01% FS/°F (0.02% FS/°C) (±1.0” W.C @-4 to 140°F (-20 to 60°C) 0.04% FS/°F (0.07% FS/°C) (±1.0” W.C @-4 to 140°F (-20 to 60°C)
Environmental Operation Range -4 to 140°F (-20 to 60°C)
Storage Temperature -40 to 203°F (-40 to 95°C)
Overpressure Proof: 300.1 WC (10.83 PSI)
Burst: 512.6 WC (18.5 PSI)
Wiring* 2 wires (4 to 20mA Current loop)
3 wires (AC or DC powered, Voltage out)
Humidity 0 to 95% RH, non-condensing
Port Size 1/4” tubing (1/8” to 3/16” I.D.)
Enclosure Material UV-resistant Polycarbonate, UL94, V-0
Enclosure Rating IP44, NEMA 2

*We recommend that you do not run wiring for the pressure transmitter in the same conduit as line voltage wiring or with wiring used to supply highly inductive loads such as motor, generators, and coils.