Honeywell Gauge Pressure Transmitters – SmartLine STG700

SmartLine® ST700 Gauge Pressure Transmitters are ideal for applications ranging from high-pressure measurements in boilers and fuel feeds to tank level measurement applications with a relatively high process temperature.

Category: Pressure Transmitters

Dual Head Gauge Pressure Transmitters are suited for typical applications involving reaction vessels in the chemical industry and level applications with process temperatures up to 257°F /125°C.
In-Line transmitters are screwed directly onto a 1/2” male NPT nipple and can be installed in hazardous environments for accurate, repeatable pressure measurement. Typical applications include high-pressure measurement in boilers, fuel feeds and high-pressure reaction vessels in the petrochemical and hydrocarbon recovery industries.

The following models are available:

Model	Range(psi)	Range(Bar)
STG730/ STG735/ STG73L/ STG73S	0-50	0-3.5
STG740/ STG745/ STG74L/ STG74S	0-500	0-35
STG770/ STG775/ STG77L/ STG77S	0-3,000	0-210
STG78L/ STG78S	0-6,000	0-420
STG79L/ STG79S	0-10,000	0-690

Overview
Models	STG730 / STG73L / STG740 / STG74L / STG770 / STG77L / STG78L / STG79L
Environmental Conditions
Maximum Allowable Working Pressure (MAWP)	50 psi (3.5 bar) to 10,000 psi (690 bar) depending on model
Meter Body Temperature Limits	-40 to +125 deg C (max)
Ambient Temperature Limits	-40 to +85 deg C (Operating), -55 to +120 deg C (Storage)
Relative Humidity	0 to 100% RH
Measurement Type	Gauge Pressure
Rangeability	Up to 100:1
Stability	Up to 0.02% of URL per year for 10 years
I/O Capabilities
Process Connection Type	1/2 in NPT (Female/Male), DIN 19213, 9/16-18 High-Pressure Cone & Thread, G1/2-B Male Thread
Marine Certification	ABS, BV, DNV, KR, LR
Response Time	As fast as 100 ms millisecond
Configuration	External Zero, Span, & Configuration Capability; Two or Three-Button Local Configuration
Processing & Performance Metrics
Maximum Turndown Ratio	100:1
Accuracy	Up to 0.055% of span (standard), 0.04% (optional) Up to 0.065% of span
Communication & Protocols
Output/Communications	4 to 20 mA, Honeywell DE, HART (v7.0)
Functional & Control Features
Sensor Technology	Piezoresistive sensor with on-chip temperature compensation
Mechanical & Physical Properties
Wetted Materials	Diaphragm: 316L Stainless Steel, Hastelloy C-276, Monel 400, Tantalum (model dependent)
Standards & Certifications
Safety Approvals	SIL 2/3 Certified, Dual Seal Design, NAMUR NE-43 Compliance, World Class Overpressure Protection
Approvals	FM, CSA, ATEX, IECEx, NEPSI, KOSHA, EAC, CCoE, UATR, SAEx, INMETRO, Marine (ABS, BV, DNV, KR, LR), IEC 61508 SIL 2/3
Technical Specifications
Display Options	Modular LCD (Alphanumeric or Advanced Graphics), Multiple Screens, Configurable Units
Supply Voltage	DE: 15 to 49.3 VDC HART: 10.8 to 42.4 VDC
Pressure Range	STG730/STG73L: 50 psi (3.5 bar) STG740/STG74L: 500 psi (35 bar) STG770/STG77L: 3000 psi (210 bar) STG78L: 6000 psi (420 bar) STG79L: 10,000 psi (690 bar)
Wiring / Mechanical & Physical Properties
Wiring	Up to 16 AWG (1.5 mm diameter)