The Detcon DM-634 models are discontinued; replacements are detailed here and pictured. Below is a list of spare parts available for maintenance and calibration.

Non-intrusive “Smart” sensors are designed to monitor ambient air for Oxygen concentrations in the range of 0-25% by volume. The sensor assembly consists of a sensor in a stainless steel housing that includes a splashguard with an integral calibration port, a plug-in control transmitter circuit, a base connector board and an explosion-proof enclosure.

Two choices of MicroSafe detector

966-344520-025 DM-634 in Aluminium Junction Box.
966-34452B-025 DM-634 in Stainless Steel Junction Box.

Features

• CSA-NRTL Approved: Class I, Division 1, Groups B, C, & D.
• Compatible with PLCs, SCADA, DCS, via 4-20 mA, and/or RS-485, and/or alarm relays.
• Sensor status and parameters are accessible via RS-485 (Modbus).
• Menu programmable relays standard (two alarms plus fault).
• Simple menu-driven calibration – takes less than 3 minutes.
• Backlit LCD and LED indicators for fault and Cal status.
• Plug-in field-replaceable transmitter.
• Electrochemical plug-in sensor.
• Embedded temperature compensation provides direct correction to changes in ambient temperature.
• 2-year expected sensor life in air with 20.9% Oxygen.

Spare Parts

370-399100-000 Oxygen field replaceable plug-in sensor 400/500/600 series
926-345500-025 Plug-in transmitter control module (Model DM-634)
500-001794-004 Standard connector board Model series 600 sensors
399-200000-000 Stainless steel sensor housing with insert and flame arrestor
613-120000-700 Sensor splash guard with integral cal-port – FP/DM/IR
943-000006-132 Calibration adapter FP/IR/DM/O2
330-X50000-000 Field Replaceable sintered stainless steel flame arrestor
975-000020-892 Sensor Duct Mount Kit – DM Series
612-400000-000 Sensor/Sintered Filter replacement wrench FP/DM/IR
943-002273-000 Harsh location dust guard (fits 1.5 x 18 thread)
033-003238-000 “Harsh location dust guard replacement filter for 1.5 x 18 thread (Sold in a pack of qty 20)