April 30, 2019 by $125.00 TH-USBTemperature Humidity Logger TH-USB - Temperature Humidity Logger quantity Add to cart Category: Accessories Related products MEM2 – Extended Memory Upgrade for PS4550/PS3550 $245.00 Add to cart BTA – Bluetooth USB Adapter $45.00 Add to cart CHGU – Universal Wall Charger (for all but PS3000) $40.00 Add to cart LDCm – 480V Line-to-DC Converter $245.00 Add to cart