Parshvi Technology (India) Private Limited

Measuring ranges:

• Multiple measurement units, field selectable via jumper, including: inWC, mmWC, Pa, mbar.
• 8 field selectable measurement ranges, unidirectional or bi-directional, selectable via jumper.
• Proportional output options including: voltage (0–10 V) and current (4–20 mA).

• AZ (autozero) function for automatic zero point calibration, eliminating the need for periodic manual autozeroing to ensure long term accuracy
• Backlit display
• Field adjustable span point calibration (i.e. gain)

• Fan, blower and filter monitoring
• Pressure and flow monitoring
• Valve and damper control
• Pressure monitoring in cleanrooms

Additional Information:

• Delivery Time: Ready stock
• Packaging Details: Box packing

The differential pressure transmitters of the 984 series are used to measure differential pressure, overpressure and vacuum. They provide up to 8 pressure ranges and 2 output signals, which are easily selectable by jumper or rotary selector switch.

For an optimum adaptation to the application, the transmitter can be switched between various pressure ranges. The factory setting is the most sensitive range. For the series 984M and 984A the less sensitive second range will be selected by simply removing a jumper. For the series 984Q the available eight ranges can be selected by a rotary selector switch.


Applications: Monitoring of gaseous, non-combustible and non-aggressive media. Possible usage areas are:

• BMS and HVAC systems 
• Inside Pressure Measuring on Industrial Boilers, Furnaces and Dryers
• Bag-filter pressure monitoring
• Furnace draft pressure monitoring
• Building automation, air conditioning and clean room technology
• Valve and flap control
• Filter, fan and blower monitoring

Additional Information:

• Delivery Time: Ready stock
• Packaging Details: Box Packing

• BMS and HVAC systems 
• Inside Pressure Measuring on Industrial Boilers, Furnaces and Dryers
• Bag-filter pressure monitoring
• Kiln draft pressure monitoring

• Setting ranges: Depending on type between -100 Pa and 1 bar

• Configurable pressure range: For an optimum adaptation to the application, the transmittercan be switched between various pressure ranges. The factorysetting is the most sensitive range. For the series 985M and 985A the less sensitive second range will be selected by simplyremoving a jumper. For the series 985Q the available eightranges can be selected by a rotary selector switch.

• Output signal selection:The output signal of the 3-wire version can be changed between 0 -10 Volt and 4-20 mA by removing a jumper.The series 985M is also available in a 2-wire version with 4-20 mA output signal.

• Configurable response time:The response time of the output signal can be configured using a jumper. If the jumper is in place the response time is slow (factory setting), which is useful for suppressing brief pressure peaks. If the application requires a fast response time the jumper must be removed.

• Easy offset calibration:The output signal of the 985M series can be calibrated to zero by pressing the MODE/Offset button in a pressureless state of the transmitter. The series 985A and 985Q perform an automated zero offset compensation.

Additional Information:

• Delivery Time: 4-5 working weeks
• Packaging Details: Box packing

The differential pressure transmitters of the 982R series are used to measure differential pressure, overpressure and vacuum. They provide one adjustable pressure range and one output signal. Monitoring of gaseous, non-combustible and non-aggressive media.

The end of the pressure range can be reduced to 50% of its factory set full scale value simply by the use of a push-button.

Applications:

• Building automation, air conditioning and clean room technology
• Valve and flap control
• Filter, fan and blower monitoring
• Control of air flows
• Medical equipments

Features:

• Adjustable pressure range: The end of the pressure range can be reduced to 50% of its factory set full scale value simply by the use of a push-button.

• Output signal:0-10 V or 4-20 mA. Other signals on request.

• Easy offset calibration: The output signal can be calibrated to zero by pressing the push-button (pressure transmitter must be depressurised).

• Configurable response time: The response time of the output signal can be configured using a jumper. If the jumper is in place the response time is slow (factory setting), which is useful for suppressing brief pressure peaks. If the application requires a fast response time the jumper must be removed.

• Volume flow measurement (optional): The shape of the output signal can be programmed to square root by the factory.

• Reset: The transmitter can be reset to its factory setting, just by pressing the push-button for >10 sec.

• Measuring method: Piezoresistive pressure transducer

Additional Information:

• Item Code: 982R
• Delivery Time: 4-5 working weeks
• Packaging Details: OEM box packing

• Min. pressure range 0-25 Pascal and max. pressure up to 0-2.5 bar (Other as per customer requirement)
• Adjustable pressure range To adapt the instrument to the application, the factory-set pressure range can be modified in the menu in a range from 100% to 50% of its full scale value.
• Switchable output signal 0-10V or 4-20mA, easy to switch in the menu. Further values on request.
• Switchable pressure units The instrument offers three different pressure units to show in the display, which can be selected in the menu. Factory setting is Pascal (kPa), which can be changed to mmWC, mbar or inWC.

• Building automation and air conditioning systems
• Overpressure measurement in clean rooms and laboratories 
• Measurement of constant pressure in VAV applications
• Dynamic filter and ventilator monitoring
• Bag-filter (Dust collector) application
• AHU's application

Additional Information:

• Delivery Time: Ready stock
• Packaging Details: Box packing

This compact differential pressure transmitter is designed for basic and reliable pressure measurement in cleanrooms, HVAC systems, industrial machines, and filter monitoring applications. Its robust ABS housing with IP67 protection ensures dependable performance even in demanding industrial environments. The transmitter supports DIN top-hat rail or wall mounting, allowing flexible installation.

The instrument offers symmetrical (±) as well as asymmetrical measurement ranges and is available with either a single fixed range or the ability to toggle between up to four different measurement ranges. Pressure measurement can be displayed in Pa or kPa with a linear output signal, while a square-root output option makes it ideal for flow-related applications.

Configuration is simple using DIP switches, and accuracy is maintained through zero-point correction and fine adjustment via internal pushbuttons or digital input. Optional features such as a 3½-digit display, 2-wire system or relay output (6 A), and plug-in electrical connection enable easy commissioning and operation.

Additional Information:

• Delivery Time: 4-5 working weeks
• Packaging Details: Box packing

Field adjustable, multi-range differential pressure transmitters for air
DPT-R8 series differential pressure transmitters are engineered for building automation in the HVAC/R industry. The most technologically advanced transmitters on the market measuring static and differential pressure, with field selectable units, range and output, all in a single device.

DPT-R8 series devices include:
• Multiple measurement units, field selectable via jumper, including: inWC, mmWC, Pa, mbar.
• 8 field selectable measurement ranges, unidirectional or bi-directional, selectable via jumper.
• Proportional output options including: voltage (0–10 V) and current (4–20 mA).

• Range: ±100, 100, 250, 500, 1000, 1500, 2000, 2500 Pa Measuring units: Pa, kPa, mbar, inchWC, mmWC, psi, selectable via jumper
• Zero Point Calibration:  by Manual pushbutton                                                                                                                 
• Accuracy (from applied pressure): 1% 
• Protection standard: IP54
• Power supply: 24 VAC or VDC, ±10 %
• Output: 4 to 20 mA or 0 to 10 V, 3-wire
• With Display

The differential pressure transmitters of the 984 series are used to measure differential pressure, overpressure and vacuum. They provide up to 8 pressure ranges and 2 output signals, which are easily selectable by jumper or rotary selector switch.

For an optimum adaptation to the application, the transmitter can be switched between various pressure ranges. The factory setting is the most sensitive range. For the series 984M and 984A the less sensitive second range will be selected by simply removing a jumper. For the series 984Q the available eight ranges can be selected by a rotary selector switch.

• Building automation and air conditioning systems
• Overpressure measurement in clean rooms and laboratories
• Measurement of constant pressure in VAV applications
• Dynamic filter and ventilator monitoring.

Communication:
The digital signal Modbus enables direct connection to control / regulating systems.

Configuration of volume flow or flow velocity measurement:
1. Select a calculation formula and enter a k-factor. Both dependents on the type of ventilator or measuring probe.
2. Or create a reference volume flow or flow velocity, which is entered directly.
The modbus is used to set the device. Please read the exact procedure in the manual.

Adjustable response time:
The response time of the output signal can be variably set via Modbus.

Easy offset calibration:
For 985M-Modbus and 985VM-Modbus press the MODE/Offset button or set via Modbus in an unpressurized state to adjust the offset to zero. The Versions 985A-Modbus and 985VA-Modbus perform an automated zero offset compensation.

Display:
A red LED display shows the pressure value, volume flow or flow velocity.

Mounting position:
Can be mounted in any position. The zero offset calibration eliminates any possible position error.

• Building automation
• Measurement technology in the sanitary and industrial sector
• Differential pressure measurement between supply and return in heating systems
• Monitoring of filters, fans and compressors
• Cooling systems for heating / air conditioning

Pressure range
For an optimal adaptation to the application, different pressure ranges are available. The measurement is carried out by a ceramic pressure measuring cell, temperature-compensated via internal PTC.

Output signal
In the 3-wire version there is an output signal of 0 … 10 V, or 4 … 20 mA available. For the 2-wire version the transmitter provides an output signal of 4 … 20 mA.

Electrical connection
The electrical connection of the transmitter is optionally available with a 4-pin standardized device plug according to DIN EN 175301 Form A, or with a 4-pin M12 flange plug, A-coded, according to DIN EN 61079.

OEM versions, assembled versions and different connection threads, as well as other measuring ranges are available on request.

• Building automation and air conditioning systems
• Overpressure measurement in clean rooms and laboratories
• Measurement of constant pressure in VAV applications
• Dynamic filter and ventilator monitoring

Communication:
The digital signal Modbus enables direct connection to control / regulating systems.

Configuration of volume flow or flow velocity measurement:
1. Select a calculation formula and enter a k-factor. Both dependents on the type of ventilator or measuring probe.
2. Or create a reference volume flow or flow velocity, which is entered directly.
The modbus is used to set the device. Please read the exact procedure in the manual.

Adjustable response time:
The response time of the output signal can be variably set via Modbus.

Easy offset calibration:
For 985M-Modbus and 985VM-Modbus press the MODE/Offset button or set via Modbus in an unpressurized state to adjust the offset to zero. The Versions 985A-Modbus and 985VA-Modbus perform an automated zero offset compensation.

Display:
A red LED display shows the pressure value, volume flow or flow velocity.

Mounting position:
Can be mounted in any position. The zero offset calibration eliminates any possible position error.

The DPI series electronic pressure measuring devices are engineered for building automation in HVAC/R industry. The most technologically advanced and versatile electronic differential pressure switches on the market, combining up to two relay outputs and 0-10 V output options.

The DPI includes the following field selectable features:

• Configurable switching point: Open on rise or fall in pressure hysteresis of setpoint
• Measurement units (Pa, kPa, mmWC, inWC, mbar)
• Measurement range (4 ranges per model)
• Output signal (0-10 V, NO/NC)
• Span and zero point calibration

Additional Information:

• Item Code: DPI
• Delivery Time: 3-4 working weeks
• Packaging Details: Box packing

Special features:

• Measurement of differential pressure, volume flow or P-/T-compensated volume flow (optional) possible
• Volume flow can be configured via k-factor, dP_max/V_max or 20 individual values
• Scaling, characteristic line form and many other parameters can be set via PC-software (optional)
• With USB interface
• 2 floating switching relays (optional)
• Output signal can be configured 0-10 V or 0/4-20 mA
• Highly stable measurements thanks to cyclical self-calibration of the zero point
• Can be calibrated
• Suitable for top-hat rail mounting in control cabinets
• Delivery possible already completely integrated into the control cabinet (on request)

• Building automation and air conditioning systems
• Pharma machine application for differential pressure & Air flow measurement 
• Sterilization, Depyrogenation Tunnel & Isolator applications
• Leak Testing machine
• The P34 differential pressure transmitter is designed for pressure monitoring applications in cleanrooms, laboratories, pharmaceutical plants and operating theatres as well as for special uses in machine and plant construction. As well as measuring the differential pressure, the instrument also records positive and negative overpressures as well as flow rates or volumetric flows.
• The measuring range is scalable in the range from 10-100 %. Two optional contact points allow the user to connect visual or audible alarms that are triggered any time values rise above or fall below specified limits. The transmitter can be configured easily via an USB interface (optional) with software. A selectable time constant allows the transmitter to be adjusted perfectly to the pressure conditions and thus ensures a stable output signal. The P 34 can be mounted on top-hat rails
• The instrument is available with an ISO factory calibration or DAkkS-accredited calibration certificate (optional).
• For volume flow applications also complete measuring sections can be delivered and calibrated (DAkkS-accreditaion being prepared).

Additional Information:

• Delivery Time: 4-6 working weeks
• Packaging Details: Box packing

Special features:

• Measurement ranges (also ±) others available upon request 50/100/200/500 Pa & 1/2.5/5/10 kPa
• Robust ABS housing with protection class IP 67 for mounting on top-hat rails or a wall (with just 2 screws)
• Comes with either a defined measurement range or with the option of alternating between 4 measurement ranges
• Adjustable output signal 0/2-10 V or 0/4-20 mA
• Adjustable output signal attenuation of up to 10 s
• LC display (optional)
• Can be calibrated
• Zero-point calibration via an external voltage signal lowers maintenance requirements.
• An adjustable limit switch allows users to connect equipment such as fans or signalling devices, and eliminates additional switching processes (optional).

• Building automation and air conditioning systems
• Pharma machine application for Differential pressure & Air flow measurement 
• Textile machine application - Carding, Draframe, Ringframe, Blowroom
• Bag-filter (Dust collector) application
• Draft pressure measurement in furnace, blower & boiler 

• This pressure transmitter is particularly well suited for monitoring filters and pressures in HVAC (heating, ventilation and air conditioning) applications.

• DIP switches allow users to configure the output signal and switchable measurement ranges (optional). Settings provide an option for conversion to a root-extracted output signal (displayed as a % of the maximum output value). An internal button is also available for performing a zero-point correction or fine-tuning the end value.

• An optional display allows users to read the measured value directly on site in Pa or kPa. With an optional time constant (up to 10s), the instrument can produce an attenuated output signal, even under unstable pressure conditions. An optional two-wire version of the device is also available for reducing wiring complexity. In addition to simple wall-mounting with just 2 screws, the PS 17 is also suitable for mounting on top-hat rails.

• The device is also available with an optional ISO-compliant factory calibration certificate or a DAkkS-accredited calibration certificate.

Additional Information:

• Delivery Time: 4-6 working weeks
• Packaging Details: Box packing

Special features:

• High level of accuracy and long-term stability
• Little zero point drift or hysteresis; largely independent of temperature
• Measurement of positive and negative differential pressures
• LCD display (optional)
• Output signal 4-20 mA
• Factory-adjusted attenuation of the output signal of up to 5 s possible (optional)
• Can be calibrated

• Building automation and air conditioning systems
• Pharma machine application for differential pressure & Air flow measurement 
• Sterilization, Depyrogenation Tunnel & Isolator applications
• This differential pressure transmitter reduces wiring costs thanks to its two-wire technology. An optional display allows measurement values to be read directly on-site in Pa, kPa or mmH₂O. An optional time constant (up to 5s) allows the instrument to generate an attenuated output signal, even under fluctuating pressure conditions. 
• The instrument is available with an ISO factory calibration or DAkkS-accredited calibration certificate (optional).

Additional Information:

• Delivery Time: 4-6 working weeks
• Packaging Details: Box packing

Special features:

• Measurement ranges: 0-10 mbar, 0-25 mbar
• High level of accuracy
• Little zero point drift or hysteresis; largely independent of temperature
• LCD display (optional)
• Output signal: 0-10 V (PU),  0/4-20 mA (PI)
• Factory-adjusted attenuation of the output signal of up to 5 s possible (optional)
• Can be calibrated

• Building automation and air conditioning systems 
• Pharma machines - low pressure measurement
• Textile machine application - Carding, Draframe, Ringframe, Blowroom

Additional Information:

• Item Code: PU
• Delivery Time: Ready stock
• Packaging Details: Box packing

Multifunctional differential pressure transmitters with air flow measurement and Modbus communication
DPT-MOD is a multifunctional transmitter for measuring volume flow, velocity, and static and differential pressure. The measurements can be read and the configuration done via Modbus communication. DPT-MOD requires less wiring than the traditional 3-wire transmitters because multiple devices can be connected on serial line. DPT-MOD can also be used with several different measurement probes such as FloXact™ or pitot tube, and air dampers.

DPT-MOD series devices include:
• Two selectable functions:
o Measure and monitor in-duct volume flow, velocity or
differential pressure
o Measure and monitor air flow across centrifugal fans
• Multiple selectable measurement units:
o Volume flow: m3/s, m3/h, cfm, l/s
o Velocity: m/s, ft/min
o Pressure: Pa, inWC, mmWC, kPa, mbar
• Modbus communication protocol

DPT-MOD series device options offer:
• AZ (autozero) function for automatic zero point calibration, eliminating the need for periodic manual autozeroing to ensure long term accuracy

• Range: -250 Pa to 2500 Pa
• Power supply: 24 VAC or VDC
• Output: Via Modbus
• Interface: RS485
• selectable via menu or via Modbus
• Multiple field selectable measurement units:
• o Volume flow: m3/s, m3/h, cfm, l/s
• o Velocity: m/s, ft./min
• o Pressure: Pa, inWC, mmWC, kPa, mbar, psi 
• With Display 
• Display: 2-line display (12 characters/line)
•   Line 1: Direction of control output 
• Line 2: Pressure or air flow measurement, selectable via menu

The P 29.2 Differential Pressure Transducer is a high-accuracy instrument designed for precise measurement of differential pressure and volume flow in air, non-aggressive gases, and natural gas applications. It offers stable and drift-free performance with automatic zero-point adjustment, ensuring long-term reliability in industrial environments.

This transmitter supports very low pressure ranges starting from 10 Pa, with uni-directional and bi-directional measurement capability. The device is easy to commission and can be mounted on a DIN rail or wall. It comes with multiple switching and analog outputs as standard, making it suitable for process control, HVAC, gas monitoring, and flow measurement applications.

Configuration is simple using free parameterization software via the built-in USB-C interface. An optional display with keypad allows local setup and monitoring. The robust IP65 housing ensures protection against dust and water, making it ideal for demanding industrial conditions.

Key Features:

• High-precision differential pressure measurement for natural gas and air

• Measurement ranges from 10 Pa (uni- and bidirectional)

• Suitable for pressure and volume flow measurement

• Automatic zero-point adjustment (no drift)

• Multiple analog and switching outputs

• USB-C interface with free configuration software

• Optional display and M12 electrical connector

• IP65 protection, robust industrial design

• CE / UKCA and UL / CSA certified

• Range: ±25, ±50, ±100, ±500, 25, 50, 250, 1000 PA (field
• selectable via jumper)
• Accuracy* (from applied pressure): 0.4 % ±0.4 Pa
• Measuring units: Pa, kPa, mbar, inchWC, mmWC, psi,
• (selectable via jumper)
• Zero point calibration: Automatic auto zero and manual
• pushbutton
• Protection standard: IP54
• Display: 2-line display (12 characters/line)
• Line 1: active measurement
• Line 2: units

DPT-Priima is a high accuracy differential pressure transmitter designed for cleanrooms and other high accuracy applications. DPT-Priima has a new, extremely accurate sensor, optional span point calibration and automatic zero point calibration.