Widely used in petroleum, chemical, metallurgy, electric power, food, paper, medicine, textile and other industries

  • 型号: TNF-3051


 Widely used in petroleum, chemical, metallurgy, electric power, food, paper, medicine, textile and other industries

 TNF-3051 intelligent pressure / differential pressure transmitter is my company draw on advanced foreign experience, the application of full isolation circuit technology developed and designed with full isolation HART communication protocol intelligent field measuring instruments.

 Since the transmitter circuit technology with a full isolation design, the power supply box sensor signal isolated and greatly improve the overall stability and anti-jamming capability.

 The transmitter has three basic function keys in addition to the conventional zero adjustment smart transmitter, span and zero pressure fine-tuning, but also on the display designed by F1, F2 and F3 three buttons used in combination with online passive migration (no need to add pressure to set the measurement range, zero and full bit amend pressure value), set the display unit quantities, linear, square root transformation, set the damping time and fixed current output function. The transmitter also has a parameter data backup and restoring functions. When the data is damaged, online restore corrupted data via three buttons, and you can instantly backup data modifications.


* High precision: 0.5%, 0.1% F.S

* Range, zero external continuously adjustable, turndown ratio of 100: 1

* positive transfer of up to 500%, negative transfer of up to 600%

* stable performance, stability: 0.25% 60 months

* contact with the membrane material can be selected; mortgage cast aluminum housing

* compact (2.4kg) stainless steel flange, easy to install

* process connection to other compatible products to achieve the best measurement

* standard 4-20mA, with HART protocol

Technical Parameters



Analog output: two –wire 4-20mADC

Digital output: two –wire 4-20mADC and superimposing variable digital signal accord with HART

Power supply

supply voltage 12.5- 45VDC

Limit load

Max load resistor Rmax in loop decided by the supply voltage, see the below drawing.  HART


PROTOCOL require the load resistor not less than 250Ω, not more than 600Ω

Communication distance

Max. 1.5Km, multi-address communication can connect 15 smart transmitters Max.


4 digital display,5 digit LCD display, pointer type.


ExiaIICT5;explosion suppression type

Zero offset

Can positive transfer or negative transfer, but cannot overstep the utmost value


ambient temperature -40-85℃(When choose LCD : -20-70℃)

Medium temperature


Static pressure and single side overpressure

3.45KPa(absolute pressure)~31.2MPa(gauge pressure)

Relative humidity


Run-up time

less than 5 sec.

Capability change

Less than 0.16cm3

Damp adjust

0.20~25 second

Malfunction alarming

If occur malfunction, automatism diagnose function will output 3.9 or 21.0mA

Configuration protection

To avoid the datas are modified random, can utilize software or protect switch lock the record data