GDT-20

On order

WIKA · SF6 gas solutions · Family GDT

Transmitter

Name: Transmitter
Brand: WIKA

For density, temperature and pressure of SF 6 gas, with Modbus ® output

Range

0…16 bar

Output

Modbus RTU via RS-485

Accuracy

±0.6 %

Protection

IP65

EACCRNChina RoHSEMC directive

Price

On request

Depends on configuration

Request a quote

+38 (067) 285-77-70·info@avigan.com.uaViberTelegram

Description

The model GDT-20 transmitter is a multi-sensor system with digital output for the measurands of pressure and temperature. Based on these measured values, the condition-related data can be determined.

Special features

High-accuracy sensor technology
Modbus ® output protocol via RS-485 interface
Ingress protection IP65
Very good long-term stability and EMC characteristics
Compact dimensions

Identification

Model	GDT-20
Product family	GDT
Subcategory	Transmitter

Measuring range

Pressure ranges	0…16 bar · 0…16 bar abs. · 0…16 barabs.
Density reference temperature	20 °C

Accuracy

Accuracy class

±0.6 %, ±0.35 g/litre

Process conditions

Process connection

G ½" B, male threadG 1/2" B, male thread

Electrical characteristics

Output signal

Modbus RTU via RS-485

Materials

Wetted parts material

Stainless steel

Operating environment

Ambient temperature	−40…+80 °C
IP rating	IP65
Weight	0.4 kg

Certifications and approvals

Certifications

EACCRNChina RoHSEMC directive

Additional details

Temperature compensation	Yes
Datasheet languages	EN

Tables from datasheet

Accuracy specifications

Accuracy	The specifications only valid for pure SF 6 gas
Density	±0.6 %, ±0.35 g/litre at -40 ...+80 °C [-40 ...+176 °F]
Temperature	±1 K
Pressure	-40 ...< 0 °C [-40 ...+32 °F] ±0.2 %, ±32 mbar
	0 ... 80 °C [32 ... 176 °F] ±0.06 %, ±10 mbar
Refresh rate
Density	20 ms
Temperature	20 ms
Pressure	20 ms
Long-term stability at reference conditions
Temperature	≤ ±0.1 %of span/year
Pressure	≤ ±0.05 %of span/year

Measuring ranges

Density	0 ... 60 g/litre (8.87 bar abs. at 20 °C [68 °F])
Temperature	-40 ...+80 °C [-40 ...+176 °F]
Pressure	0 ... 16 bar abs.
Burst pressure	52 bar abs.
Overpressure limit	Up to 30 bar abs.
Pressure reference	Absolute
Unit	Measured values with alternative units can be retrieved directly in the Modbus  registers
Density	g/litre, kg/m³
Temperature	°C, °F, K
Pressure	mbar, Pa, kPa, MPa, psi, N/cm², bar (at 20 °C [68 °F])

Process connection

Thread	G½ " B, male thread
Material	Stainless steel
Transmission fluid	Synthetic oil

Output signal

Voltage supply U B	DC 17 ...30V
Power consumption	Max.0.5W

View all (10)

Electrical connection

Connection type	■ Circular connector M12 x 1 (5-pin) ■ Modbus  RTU via RS-485 interface
Modbus  functionality	■ Mixture ratio of SF 6 to N 2 or CF 4 (factory setting:100%SF 6 gas) ■ Customer-specific sensor name

Material

Process connection	Stainless steel
Case	Stainless steel

Operating conditions

Permissible temperature ranges
Standard	Operation	-40 ...+80 °C [-40 ...+176 °F]
Storage	-40 ...+80 °C [-40 ...+176 °F]
Option	Operation	-60 ...+80 °C [-76 ...+176 °F]
Storage	-60 ...+80 °C [-76 ...+176 °F]
Permissible air humidity	≤ 90 %r.h. (non-condensing)
Ingress protection IP (IP code) per IEC 60529	IP65, only when plugged in and using mating connectors with the corresponding ingress protection
Electrical safety	Protected against reverse polarity, protected against overvoltage
EMC tests	Immunity per IEC 61000-4-3	30 V/m (80 MHz ... 2.7 GHz)
Burst per IEC 61000-4-4	4 kV
Surge immunity per IEC 61000-4-5	2 kV conductor to ground, 1 kV conductor to conductor
ESD per IEC 61000-4-2	8 kV/15 kV, contact/air
High-frequency fields per IEC 61000-4-6	10V

Logo	Description	Country
	EAC	Eurasian Economic Community
-	CRN Safety (e.g. electr. safety, overpressure, ...)	Canada

Logo	Description
-	China RoHS directive

Designation	Order number
Modbus ® startup kit for configuration, consisting of: ■ Power supply unit for transmitter ■ Cable with M12 x 1 connector ■ Interface converter (RS-485 to USB) ■ USB cable type A to type B ■ Modbus ® tool software on USB stick	14075896