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Model-A-709
Temp Transmitter Enclosure for 1/4" Probes, Detachable Cover & Mounting Adapters
Model-A-709
From
SGD
114.40
Product Overview
- Enclosure Ratings NEMA Type 4X
- Operating Temperature, Max 212 °F
- Operating Temperature, Min -40 °F
- Series ID Model-A-709
Supported Applications
The Dwyer Model A-709 is a temperature transmitter enclosure designed to house and protect RTD temperature transmitters, specifically the Series 651 and Series 659 models. It mounts these transmitters to 1/4" diameter temperature sensors for indoor or outdoor service.
Operating Conditions & Performance
The enclosure is rated NEMA 4X and constructed with an aluminum housing. The documented operating ambient temperature range is -40 to 212°F (-40 to 100°C). No specific pressure ratings, burst pressures, or vibration/shock specifications are provided in the source documentation.
Dimensions
- Height: 2-27/32 in (72.23 mm)
- Width: 3-5/32 in (80.10 mm to 80.12 mm per source variation)
- Depth: 1-21/32 in (42.07 mm)
- Base Diameter/Height: 1-5/8 in (41.28 mm)
Configuration Options
The Model A-709 includes a removable core screw with an attached chain to prevent loss during installation or maintenance. The enclosure provides specific interfaces for sensor and wiring integration:
- Sensor Mounting: 1/8" NPT threads are provided on the assembled unit for mounting.
- Wiring Feed-through: A 1/2" NPT opening allows wiring to pass through for both transmitter and sensor connections.
Included Adapters and Fittings
The enclosure ships with the following components required for assembly:- Enclosure Cover
- 1/8" male NPT x 7/16-24 male Adapter
- 1/8" male NPT x 7/16 female Adapter
- 1/2" male NPT x 1/8" female Bushing
- M4x8 Socket Cap Screws (quantity: 2)
- 1/4" I.D. x 3/8" O.D. O-ring
Optional Accessories
The series supports the following optional configurations:- Series RTD Temperature Transmitter (e.g., Series 651)
- A-345 1/8" NPT flange with gasket and two self-tapping screws for sheet metal duct installation
Key Product Differences
The Model A-709 is a single enclosure configuration intended to accommodate Series 651 or Series 659 transmitters. The assembly process involves inserting the bushing and adapters, attaching the RTD transmitter using M4x8 screws, feeding wiring through the 1/2" NPT opening, and securing the sensor via hex fittings outside the enclosure.
When installing an optional A-345 flange, the unit utilizes its 1/8" NPT threads for mounting to sheet metal ducts. The documentation notes that care must be taken during wiring installation to ensure wires clear all internal metal surfaces before replacing and tightening the cover screws.
PDFs & Manuals
