Honeywell STG79S Pressure Transmitter

Model：STG79S-E1AC4AS-1-0-AHS-11S-A-10A0-00-0000

Manufacturer: Honeywell

Size: 35*30*26CM

Detail Specification: Pressure Transmitter

Comment:Carton

Shipping Weight: 5Kg

Estimated Lead Time: 12 Weeks

Payment：T/T

HS CODE：9026201090

product details

Honeywell STG79S Pressure Transmitter

Product Overview

The Honeywell STG79S Pressure Transmitter is a high-range gauge pressure instrument from the SmartLine STG700 family, designed for extreme pressure measurement applications up to 10,000 psi. Engineered for heavy industrial environments, the Honeywell STG79S combines advanced piezoresistive sensor technology with on-chip temperature compensation to deliver exceptional accuracy and long-term stability. Honeywell STG79S pressure transmitters are ideal for monitoring, control and data acquisition where process pressures reach the highest levels.

The Honeywell STG79S belongs to the SmartLine® product family, fully tested and compliant with Experion® PKS, ensuring seamless integration into modern automation systems. As a gauge in-line transmitter, the STG79S mounts directly onto a 1/2″ male NPT nipple and is approved for hazardous area installation, providing reliable measurement even under extreme conditions.

Core Sensor Technology

The Honeywell STG79S utilizes a rugged piezoresistive sensing platform that integrates pressure, temperature and static pressure sensing on a single chip. This “three-in-one” architecture enables comprehensive compensation for process temperature variations and static pressure changes. Honeywell STG79S transmitters feature ion-implanted silicon technology that automatically corrects errors, maintaining industry-leading precision across the entire operating range. The STG79S sensor is specifically reinforced for high-pressure service up to 10,000 psi.

Technical Specifications

Performance Characteristics

Parameter	Specification
Model Series	SmartLine STG700
Model	STG79S Gauge In-Line
Pressure Range	0–10,000 psi (0–690 bar)
URL (Upper Range Limit)	10,000 psi (690 bar)
LRL (Lower Range Limit)	–14.5 psi (–1.0 bar)
Minimum Span	100 psi (6.9 bar)
Maximum Span	10,000 psi (690 bar)
Accuracy (Standard)	±0.065% of calibrated span
Accuracy (Optional)	±0.04% of span
Stability	±0.02% of URL per year (10 years)
Rangeability (Turndown)	100:1
Response Time	100 ms

The Honeywell STG79S delivers ±0.065% standard accuracy, with an optional ±0.04% for tighter tolerances. Long-term stability of ±0.02% of URL per year ensures consistent performance over a decade.

Electrical Specifications

Parameter	Specification
Output Signal	4–20 mA DC, two-wire
Communication	HART® 7 (standard); MODBUS RTU (optional)
Supply Voltage	10.5 to 42.4 VDC
Turn-on Time	2.5 seconds
Supply Voltage Effect	0.005% of span per volt
Load Resistance	250–600 Ω (HART)

Honeywell STG79S transmitters support remote configuration and diagnostics via HART protocol without interrupting process operations.

Environmental & Mechanical Specifications

Parameter	Specification
Ambient Temperature	–40°C to +85°C
Process Temperature	–40°C to +125°C
Enclosure Rating	IP66/IP67 (IP68 optional)
Housing Material	Polyester powder-coated aluminum
Wetted Materials	316 SS / 316L SS (Hastelloy C-276 optional)
Fill Fluid	Silicone Oil 200
Process Connection	1/2″ NPT female
Electrical Connection	1/2″ NPT conduit entry
Weight	1.6–3.8 kg
MTBF	470 years

Complete Model Number Examples

The Honeywell STG79S ordering code allows extensive customization. Below are actual complete part numbers:

STG79S-E1G000-1-A-AHS-11C-A-00A0-00-0000 – 0–10,000 psi range, 316 SS wetted materials, silicone oil fill, HART output, standard display with internal buttons

STG79S-E2G000-1-A-AHS-11 – 0–10,000 psi, CTFE fill fluid, explosion-proof approval, 4–20 mA with HART

STG79S-F1H000-1-C-BHB-11C-B-00A0-TP-FX-FG-F1 – Alloy C-276 wetted materials, CTFE fill fluid, M20 electrical connection, custom configuration

STG79S-E1G000-1-0-GHS-12C-A-00-A6-F1-TP-0000 – NEPSI approved, 0–690 bar range, standard accuracy, HART 7

Model Number Code Breakdown

Position	Element	Options for STG79S
1	Model	STG79S
2	Wetted Materials	E (316 SS), F (Hastelloy C-276)
3	Fill Fluid	1 (Silicone Oil), 2 (CTFE)
4	Process Connection	G (1/2″ NPT)
5	Approvals	A (FM), G (NEPSI), C (CSA)
6	Housing	A (Aluminum, 1/2″ NPT)
7	Output	H (4–20 mA HART)
8	Interface	S (Standard buttons)
9	Accuracy	B (Standard), C (Enhanced)

Key Features

Diagnostics: On-board health monitoring provides early warning of potential failures, reducing unplanned downtime.

Safety: Integral dual seal per ANSI/NFPA 70-202 and ANSI/ISA 12.27.0. SIL 2/3 compliant as standard. ATEX, IECEx, CSA, NEPSI certifications available.

Modular Design: The Honeywell STG79S features replaceable sensor and electronics modules. The sensor module can be removed without de-pressurizing the process. Electronics can be field-swapped without recalibration.

Overpressure Protection: Withstands overpressure events without sensor damage. Optional 1.5X MAWP leak test certificates available.

Applications

The Honeywell STG79S is specifically suited for extreme high-pressure applications:

Oil & Gas: Wellhead pressure monitoring, hydraulic fracturing, high-pressure pipelines

Chemical: High-pressure reactors (up to 10,000 psi), catalyst regeneration

Power Generation: Boiler drum pressure, supercritical steam systems

Industrial: Hydraulic presses, high-pressure injection systems, compressor monitoring

installation Notes

Mount the STG79S directly onto a 1/2″ male NPT nipple. For optimal performance, minimize vibration at the mounting location, maintain ambient temperature within –40°C to +85°C, use appropriate conduit seals in hazardous areas, and allow access for zero/span adjustment buttons.