Min-Max Thermometer

Mercury thermometer 40°F to +120°F; 40°C to +50°C with 1° incriments.

Digital Max Min Greenhouse Thermometer Classic Design

Six's thermometer - Wikipedia

Waterproof Dual Scale Digital Thermometer with Min/Max and Hold

Digital Min/Max Thermometer – Sper Scientific Direct

Hi-Low Thermometer

ThermoWorks RT8100MAT MIN/MAX Recording Thermometer with Alarms

FlashCheck® Min-Max Alarm Digital Thermometer

Maxima-Minima thermometer with pressure key, plastic, green

Taylor Max-Min T/R Magnet Reset Thermometer

This big-digit, triple-display thermometer simultaneously shows the current, minimum and maximum temperatures and updates continuously. Provides

Min/Max Thermometer, Triple Display

SP Bel-Art, H-B DURAC Bi-Metallic Min/Max Thermometer

Deltatrak Waterproof Lollipop Min/Max Thermometer

Antiques Atlas - Max Min Thermometer By Negretti & Zambra

Digital Greenhouse Thermometer for Monitoring Maximum

Maximum/minimum thermometer environmentally friendly, plastic