on the ss2 safety switch does it have a normally open contact or is it normally closed?

The switch is normally closed. When water raises the float this opens the connection. These float switches go bad every so often. In the case where the switch has gone bad and you are sure you do not have condensate clog in your line, you can cut the wire at the top of switch and twist together the wire to the unit and cover with a wire nut. You are going to have the switch replaced anyway, so you might as well enjoy your A/C without paying for an emergency visit from your local HVAC professional. Do this only if you are 100% sure you do not have a clogged line. I take no responsibility if your line is clogged and you suffer water damage.

Can this be put into a secondary drain pan that sits under the ac?

I don't see why not. Just make sure you have the wiring set up correctly to shut down the unit. I assume there is another switch in the primary drain pan.

Can the float level be adjusted, by rotating the float shaft on a thread(?), or ?

No, I don't believe it is adjustable. Since it is designed as a type of safety switch (to turn off AC unit) there isn't a need to adjust.

What is the inside diameter of the pipe that the switch slides into? Does the switch use a float?

3/4 inch id. switch does use a float

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Description

🛡️ Stay cool, stay protected — never miss a drip with Safe-T-Switch SS2!

EFFORTLESS INSTALLATION - Fits auxiliary drain pan outlets with included 3/4" adapter—no plug needed, perfect for tight spaces.
MAINTENANCE MADE SIMPLE - Adjustable float and quick switch access streamline servicing and reduce downtime.
TRUSTED PRO GRADE QUALITY - From RectorSeal, a leader in HVAC and plumbing solutions, engineered for tradesmen who demand reliability.
SMART MAGNETIC REED SWITCH - Off-center installation friendly, ensuring reliable clog detection even in tricky setups.
CLOG DETECTION SYSTEM PROTECTION - Automatically shuts off A/C system to prevent water damage and costly repairs.

The Rectorseal 97637 Safe-T-Switch SS2 is a compact, L-shaped condensate overflow switch designed to detect clogs in air conditioner drain lines and automatically shut off the system to prevent water damage. Featuring a magnetic reed switch that allows off-center installation, an adjustable float for easy maintenance, and a 3/4" adapter for versatile mounting on auxiliary drain pan outlets, it operates at 24V AC and 1.25 amps. Trusted by professionals, this switch ensures reliable, hassle-free protection for HVAC systems.

Specifications

Operation Mode	ON-ON
Current Rating	250 Amps
Operating Voltage	110 Volts
Contact Type	Normally Closed
Connector Type	Plug In
Brand	Rectorseal
Terminal	Solder
Item dimensions L x W x H	2 x 5.5 x 8.25 inches
Circuit Type	1-way
Mounting Type	Wall Mount
Actuator Type	Magnetic Reed
Contact Material	Plastic
International Protection Rating	IP53
Number of Positions	2
Lower Temperature Rating	25 Degrees Fahrenheit
Upper Temperature Rating	125 Degrees Fahrenheit
Control Method	Touch
Connectivity Protocol	X-10
Color	White
Wattage	30 watts
Unit Count	1.0 Count
Number of Items	1
Global Trade Identification Number	00021449976374
Manufacturer	The Rectorseal Corporation
UPC	021449976374
Part Number	97637
Item Weight	7.4 ounces
Product Dimensions	2 x 5.5 x 8.25 inches
Item model number	97637
Is Discontinued By Manufacturer	No
Size	3/4"
Style	Switch
Item Package Quantity	1
Usage	personal
Batteries Included?	No
Batteries Required?	No

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