$121.99 – Thermocouple Signal, Program Output, DC Voltage / Current, RTD Signal, 24V Power Distribution Output, Analog Source.
I have just checked coupons. The lowest price I could get is $121.99 for FNIRSI SG-004A Signal Generator 0-24V 4-20mA (in Banggood). Just check coupons out (with price alert and history). Best price?
Latest coupon and price update (UTC):
Banggood ($121.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. The question is – is it a good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $114.99)
Link: Banggood product page
Price: $121.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGCL88, BG51943, BGM1TOOLS88, BGMARCHSALE, BG20236Tool, BGTOOS729, BG8FORMULAMX, BGBFDAY8, BGNEWYEAR8, BGSPRING8OFF, BGHONEYSP
(these codes were not working in latest coupon update, but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for FNIRSI SG-004A Signal Generator 0-24V 4-20mA? There we go. The lowest price was: $102.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).